This exhaust gas purification catalyst device comprises: a base member that has a plurality of exhaust gas flow passages partitioned by a partition wall; and a catalyst layer on the partition wall of the base member. The catalyst layer has a first catalyst layer which contains rhodium and a second catalyst layer which contains niobium. The exhaust gas purification catalyst device satisfies one of following conditions (A) and (B). (A) In the catalyst layer, the first catalyst layer is disposed on the upstream side of an exhaust gas flow and the second catalyst layer is disposed on the downstream side of the exhaust gas flow, except in the case where the first catalyst layer includes a region which is disposed closer to the exhaust gas flow passage side as compared to the second catalyst layer. (B) In the catalyst layer, the first catalyst layer includes a region which is disposed closer to the exhaust gas flow passage side as compared to the second catalyst layer and, on the downstream side of the base material, the first catalyst layer is not disposed closer to the exhaust gas flow passage side as compared to the second catalyst layer.
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
3233) has a gas-flow upstream-side region 100a and a gas-flow downstream-side region 100b, in which a base density of the gas-flow downstream-side region 100b is a higher than that of the gas-flow upstream-side region 100a.
An exhaust gas purification catalytic device having a first catalyst coating layer and a second catalyst coating layer on a substrate, wherein the first catalyst coating layer includes first inorganic oxide particles and first catalytic noble metal particles, the second catalyst coating layer includes second inorganic oxide particles and second catalytic noble metal particles, the first inorganic oxide particles include a composite oxide support containing an OSC material and an alkaline earth metal oxide, the first catalytic noble metal particles include one or two selected from Pt and Pd, the second inorganic oxide particles include the OSC material, the second catalytic noble metal particles include Rh, the first catalyst coating layer is substantially free of Rh, and the second catalyst coating layer is substantially free of Pt, Pd, and alkaline earth metal oxides.
A honeycomb body comprised of corrugated sheet and flat sheet, depending on the joined position of the honeycomb body and jacket, is liable to be damaged at the joined part resulting in the honeycomb body detaching and dropping out from the jacket. A honeycomb carrier 10, wherein the honeycomb carrier has a honeycomb body 110 comprised of a metallic corrugated sheet and a metallic flat sheet wound superposed and a jacket 120 housing that honeycomb body 110, the corrugated sheet and the flat sheet are fastened with each other by brazing at a first brazing fastening region 111 of a gas outflow side end part 110b of the honeycomb body, the honeycomb body 110 and the jacket 120 are fastened with each other by brazing at a second brazing fastening region 121 of the gas outflow side end part 110b of the honeycomb body, and an axial direction length of the first brazing fastening region 111 is 1.2 times or less an axial direction length of the second brazing fastening region 121. Optionally, there is a third brazing fastening region 112 at the gas inflow side end part 110a.
An exhaust gas purification catalyst includes a substrate and a catalyst layer on the substrate. The catalyst layer includes lower and upper catalyst layers. The lower catalyst layer includes a powder material containing a powdered carrier, and catalyst metal particles containing Rh on the carrier. The upper catalyst layer includes an upstream catalyst layer in an upstream side in an exhaust gas flow direction, and a downstream catalyst layer in a downstream side in the exhaust gas flow direction. At least the upstream catalyst layer of the upstream and downstream catalyst layers includes a powder material containing a powdered carrier, and catalyst metal particles containing Pd on the carrier. A cumulative 50% particle size D50 in a volume-based particle size distribution of the powder material included in at least the upstream catalyst layer of the upstream and downstream catalyst layers is 6 μm or more and 10 μm or less.
B01J 35/40 - Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
B01J 37/02 - Impregnation, coating or precipitation
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
According to the present invention, a carrier for an electrode catalyst is conductive metal oxide particles having a specific surface area of 35 m2/g or more and a pore volume of a pore having a pore diameter of 20-100 nm of 0.25 mL/g or more, and the electrode catalyst is catalyst particles for electrochemical reaction in which catalyst noble metal particles are carried on the conductive metal oxide particles.
H01B 1/02 - Conductors or conductive bodies characterised by the conductive materialsSelection of materials as conductors mainly consisting of metals or alloys
H01B 13/00 - Apparatus or processes specially adapted for manufacturing conductors or cables
H01M 4/86 - Inert electrodes with catalytic activity, e.g. for fuel cells
An exhaust gas purification device capable of reducing pressure loss and improving exhaust gas purification performance. Exhaust gas purification device including honeycomb substrate and outflow cell side catalyst. Honeycomb substrate includes porous partition wall defining plurality of cells extending from inflow side end surface to outflow side end surface. Plurality of cells include inflow and outflow cells adjacent across partition wall. Inflow cell has open inflow and sealed outflow side ends. Outflow cell side catalyst is disposed in inner region of partition wall at outflow cell side in outflow cell side catalyst-disposed range extending from outflow side end of partition wall to position apart by predetermined distance along extending direction. Minimum value of porosity in thickness direction of outflow cell side catalyst-disposed wall including outflow cell side catalyst-disposed range of partition wall and outflow cell side catalyst in range of 20% or more and 30% or less.
A supported catalyst particles include oxide carrier particles and noble metal particles supported on the oxide carrier particles, wherein the mass of the noble metal particles is less than or equal to 5 mass % based on the mass of the oxide carrier particles, and the average particle size of the noble metal particles measured by transmission electron microscopy is 1.0-2.0 nm, with the standard deviation σ less than or equal to 0.8 nm.
A method for producing catalyst particles, which are for an electrochemical reaction and in which catalytic noble metal particles are carried on conductive oxide particles, includes: using metal atom-containing organic compounds as a precursor of the conductive oxide particles and a precursor of the catalytic noble metal particles, and dissolving the metal atom-containing organic compounds in an organic solvent to obtain a precursor solution; and spraying and combusting the precursor solution.
A ring tray for honeycomb substrate firing, the ring tray supporting a honeycomb substrate having cell flow channels partitioned by cell walls, so that the flow channel direction is vertical during substrate firing, the ring tray including a ring-shaped frame part, a support part further inside than the frame part, and a connecting part connecting the frame part and support part, and the ring tray being configured so that when the honeycomb substrate is mounted on the ring tray, the support part does not contact an outer peripheral edge of a lower end surface of the honeycomb substrate, and contacts a portion of an internal region of the lower end surface of the honeycomb substrate, and is thus able to support the lower end of the honeycomb substrate, and the frame part and the connecting part do not contact the lower end surface of the honeycomb substrate.
Disclosed is an exhaust gas purification catalyst device which has a base material and a catalyst coating layer disposed on the base material, wherein: the catalyst coating layer is a single layer or a multilayer body that is composed of two or more layers; the uppermost layer of the catalyst coating layer has an upper layer first zone that contains Pd, an upper layer second zone that contains Rh, and an upper layer third zone that contains Rh in this order from the upstream side of the exhaust gas flow; and the Rh concentration in the upper layer second zone is higher than the Rh concentration in the upper layer third zone.
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01J 23/58 - Platinum group metals with alkali- or alkaline earth metals or beryllium
B01J 27/055 - Sulfates with alkali metals, copper, gold or silver
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
An exhaust gas purification catalyst device includes a substrate and one or more catalyst coating layers on the substrate, wherein the one or more catalyst coating layers include copper ion-exchanged zeolite and alkali-containing zeolite containing one or more metals selected from among alkali metals and alkaline earth metals, the exhaust gas purification catalyst device satisfying either of the following conditions (A) and (B): (A) both the copper ion-exchanged zeolite and the alkali-containing zeolite are contained in one of the catalyst coating layers, and (B) the catalyst coating layer includes a first catalyst coating layer containing the copper ion-exchanged zeolite and a second catalyst coating layer containing the alkali-containing zeolite, with the first catalyst coating layer and second catalyst coating layer being layered together in direct contact.
B01J 35/00 - Catalysts, in general, characterised by their form or physical properties
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01J 29/70 - Crystalline aluminosilicate zeolitesIsomorphous compounds thereof of types characterised by their specific structure not provided for in groups
The present invention provides an exhaust gas purifying catalyst which has a high HC purification performance at the time of cold start after hydrothermal endurance. The exhaust gas purifying catalyst disclosed herein comprises a base material and an exhaust gas purification layer that is provided on the base material. The exhaust gas purification layer contains a catalyst metal and a molecular sieve that does not substantially contain Si as a hydrocarbon adsorbent. The molecular sieve, which does not substantially contain Si, is an aluminophosphate molecular sieve that has a 12-membered ring. The crystallite diameter of the aluminophosphate molecular sieve as determined by X-ray diffraction measurement is 360 Å to 700 Å.
A method for manufacturing an exhaust gas purification catalyst device includes: (A) holding a honeycomb base material, which has a plurality of cell flow paths divided by cell walls, so that the flow path direction of the cell flow paths is vertical, and placing a coating liquid for catalyst coating layer formation on the upper end surface of the base material; (B) suctioning the post-step (A) base material from the lower end surface by a decompression pump to apply the coating liquid on the cell walls and/or in the cell walls of the base material; and, (C) transferring the post-step (A) base material to the next step, wherein step (B) and step (C) are performed simultaneously by a transfer/suction device 100.
33333 adsorption layer from the upstream end of the substrate in the exhaust gas flow direction. The PGM layer has a first PGM layer containing a catalytic noble metal selected from among Pd and Pt, and a second PGM layer containing Rh. The first PGM layer contains ceria.
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
F01N 3/24 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
16.
SILVER-SUPPORTED ZEOLITE, EXHAUST GAS PURIFICATION CATALYST, EXHAUST GAS PURIFICATION DEVICE, EXHAUST GAS PURIFICATION METHOD, AND METHOD FOR PRODUCING SILVER-SUPPORTED ZEOLITE
The purpose of the present invention is to provide: a silver-supported zeolite that has excellent hydrocarbon (HC) adsorption properties; an exhaust gas purification catalyst; an exhaust gas purification device; an exhaust gas purification method; and a method for producing the silver-supported zeolite. The present invention pertains to a silver-supported zeolite. The silver exists as at least one of silver ions, a silver elemental substance, and a silver compound. The contained proportion of silver ions included in the silver is 0.910 or more. The content of the silver is 15.0 mass% or less with respect to the total weight of the silver-supported zeolite.
C01B 39/02 - Crystalline aluminosilicate zeolitesIsomorphous compounds thereofDirect preparation thereofPreparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactantsAfter-treatment thereof
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01J 29/70 - Crystalline aluminosilicate zeolitesIsomorphous compounds thereof of types characterised by their specific structure not provided for in groups
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
An exhaust gas purifying system for a gasoline engine with high NH3 purifying performance after duration is provided. The exhaust gas purifying system for a gasoline engine disclosed herein is configured to be disposed in an exhaust path of the gasoline engine. The exhaust gas purifying system includes an upstream catalyst converter including a first catalyst body and a downstream catalyst converter including a second catalyst body. The first catalyst body contains a catalyst precious metal. The second catalyst body has a structure in which an NH3 adsorption layer and a catalyst layer are stacked on a base material. The NH3 adsorption layer of the second catalyst body contains a zeolite as an NH3 adsorber. The catalyst layer of the second catalyst body contains a catalyst precious metal and an OSC material.
A method for manufacturing an exhaust gas purification catalyst device includes: (A) placing a catalyst coating layer-forming coating liquid on the upper end surface of a honeycomb substrate having a plurality of cell flow paths partitioned by cell walls in a coating liquid placing station; (B) transferring the substrate from the coating liquid placing station to a suction station; and (C) suctioning the substrate from the lower end surface in the suction station to coat the cell walls of the substrate with the coating liquid, wherein the suction station comprises two or more suction devices, and step (B) comprises (B1) transferring the substrate, on which the coating liquid has been placed, from the coating liquid placing station to a branch station, and (B2) transferring the substrate, on which the coating liquid has been placed, to an empty suction device among the suction devices of the branch station.
Provided is an ammonia decomposition device capable of achieving both an improvement in ammonia conversion rate and an improvement in catalyst life. An ammonia decomposition device (11) comprises: an ammonia gas inlet (13); a catalyst-carrying honeycomb structure (1) that decomposes ammonia to generate hydrogen and nitrogen; and a gas outlet (14). The catalyst-carrying honeycomb structure (1) includes: a ceramic honeycomb structure; a catalyst layer (3) that is formed in a flow path (2a) of the honeycomb structure and decomposes ammonia; and electrodes (4a, 4b) that are formed on a side surface of the honeycomb structure. Electricity is passed through the honeycomb structure.
An electrocatalyst for hydrogen fuel cell anodes, including a conductive carrier and a noble metal supported on the conductive carrier, wherein the noble metal includes ruthenium and platinum, and a molar ratio Ru/Pt of the ruthenium relative to the platinum is 0.04 mol/mol or more and 0.20 mol/mol or less.
Provided is an exhaust gas purification device having a high warm-up performance and a high NOx conversion performance. The exhaust gas purification device includes a substrate having an upstream end and a downstream end, a first catalyst layer disposed on the substrate in a first region extending between the downstream end and a first position and containing rhodium, a second catalyst layer disposed on the substrate in a second region extending between the upstream end and a second position and containing rhodium and an oxygen storage material, and a third catalyst layer disposed on the second catalyst layer in a third region extending between the upstream end and a third position and containing palladium. The oxygen storage material in the second catalyst layer contains a pyrochlore type Ce—Zr composite oxide and a fluorite type Ce—Zr composite oxide at a weight ratio of from 0.2:1 to 0.4:1.
An exhaust gas purification catalyst device provided with: a base material having a plurality of exhaust gas flow paths that are partitioned from each other by a partitioning wall; and a noble metal catalyst particle-supporting layer and an inorganic oxide particle layer arranged on the partitioning wall or in the partitioning wall. In the exhaust gas purification catalyst device, the inorganic oxide particle layer is arranged nearer the exhaust gas flow path side than the noble metal catalyst particle-supporting layer and the primary particle diameter of inorganic oxide particles in the inorganic oxide particle layer is 5 nm to 200 nm inclusive.
A wall-flow type particulate filter includes: a wall-flow type base material; and a coat layer formed on the base material. The base material includes: an inlet cell open only at an exhaust gas inlet end; an outlet cell open only at an exhaust gas outlet end; and a partition partitioning the inlet and outlet cells and having multiple pores through which the inlet and outlet cells communicate with each other. The coat layer is provided for the wall surfaces of the pores and contains a first inorganic oxide and a second inorganic oxide. The mean particle diameter Da of the first inorganic oxide is larger than the mean particle diameter Db of the second inorganic oxide. The weight ratio of the second inorganic oxide is designed to be from 10% to 50% inclusive when the total weight ratio of the first inorganic oxide and the second inorganic oxide is 100%.
An exhaust gas purification catalyst containing Cu-CHA zeolite, wherein the Cu-CHA zeolite has a silica-to-alumina ratio (SAR) of no higher than 20.0 and includes an alkali metal and an alkaline earth metal.
F01N 3/20 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl specially adapted for catalytic conversion
A reaction method includes, in a gas-liquid reaction performed using a solid catalyst, alternately allowing a gaseous raw material that includes a first raw material and a liquid raw material that includes a second raw material to pass through a reaction field that holds the solid catalyst, and reacting the first and second raw materials on the solid catalyst.
C07C 209/36 - Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups by reduction of nitro groups bound to carbon atoms of six-membered aromatic rings
B01J 8/06 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with stationary particles, e.g. in fixed beds in tube reactorsChemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with stationary particles, e.g. in fixed beds the solid particles being arranged in tubes
B01J 10/00 - Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particlesApparatus specially adapted therefor
B01J 19/24 - Stationary reactors without moving elements inside
C07C 45/00 - Preparation of compounds having C=O groups bound only to carbon or hydrogen atomsPreparation of chelates of such compounds
C07C 45/37 - Preparation of compounds having C=O groups bound only to carbon or hydrogen atomsPreparation of chelates of such compounds by oxidation with molecular oxygen of C—O— functional groups to C=O groups
An exhaust gas-purifying catalyst-manufacturing apparatus includes a holder holding a honeycomb substrate in an upright state; a guide member including a cylindrical portion inserted into an upper opening of a cylindrical body to be spaced apart from the honeycomb structure and the cylindrical body, having a first flow path allowing a supply of a coating liquid through the cylindrical portion to an upper surface of the honeycomb structure, and forming a second flow path allowing a supply of gas via a gap between the cylindrical portion and the cylindrical body to the upper surface of the honeycomb structure; a supplier supplying the coating liquid to the guide member; and a suction device sucking gas from a lower end of the cylindrical body.
B05C 5/02 - Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work from an outlet device in contact, or almost in contact, with the work
An electrode catalyst which is for a hydrogen fuel cell anode and in which Pt particles and WO3 particles are carried on carbon carriers, wherein the WO3 particles have a monocline system crystalline structure.
According to the present invention, a novel exhaust gas purifying catalyst with HC and CO purification performance improved in a rich atmosphere is provided. The exhaust gas purifying catalyst disclosed herein includes a base material, a catalyst layer provided on the base material, and a reforming reaction layer provided on the base material. The catalyst layer includes a three-way catalyst. The reforming reaction layer includes a hydrogen generation catalyst. The reforming reaction layer is disposed at a position on a downstream side in a flowing direction of an exhaust gas relative to the catalyst layer.
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
The present invention provides an exhaust gas purifying catalyst which has good NOx storage performance. Disclosed is an exhaust gas purifying catalyst which comprises a base material 10 and a catalyst layer 20. The catalyst layer 20 comprises a first layer 21 that contains Pd, a second layer 22 that contains a catalyst metal and an NOx storage material, and a third layer 23 that contains Rh. The second layer 22 has a second layer upstream side portion 22a that contains Pt and Pd, and a second layer downstream side portion 22b that contains Pt. If the ratio of the Pd content to the catalyst metal content in the second layer upstream side portion 22a is defined as the Pd content ratio A and the ratio of the Pd content to the catalyst metal content in the second layer downstream side portion 22b is defined as the Pd content ratio B, the Pd content A is less than 0.5 and the Pd content A is higher than the Pd content B.
F01N 3/08 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
31.
ELECTRODE CATALYST FOR FUEL CELL AND SOLID POLYMER FUEL CELL INCLUDING THE SAME
Provided is an electrode catalyst for a fuel cell having a high activation and a high durability at the same time. The present disclosure relates to an electrode catalyst for a fuel cell including a carbon carrier and catalyst metal particles supported on the carbon carrier. The catalyst metal particles are formed of Pt or a Pt alloy. In the electrode catalyst, a BET specific surface area, a micropore area, and an R-value (=D/G) of the carbon carrier are specified. The R-value (=D/G) is an intensity ratio of a peak near 1340 cm−1 (D-band) to a peak near 1580 cm−1 (G-band) in a Raman spectroscopy analysis.
An exhaust gas purification catalyst disclosed herein comprises a catalyst layer 20 having a lower catalyst layer 22 and an upper catalyst layer 24. Moreover, a lower layer front portion A is provided at an upstream side of the lower catalyst layer 22, and a lower layer rear portion B is provided at a downstream side of the lower catalyst layer 22. Additionally, an upper layer front portion C is provided at an upstream side of the upper catalyst layer 24, and an upper layer rear portion D is provided at a downstream side of the upper catalyst layer 24. Moreover, the type of catalyst metal is separately set for each of the front portion A, the lower layer rear portion B, the upper layer front portion C, and the upper layer rear portion D. Through this, appropriate purification performance can be exhibited according to the operating status of an internal combustion engine. Additionally, with this exhaust gas purification catalyst, from the perspective of achieving both exhaust gas purification performance and suppression of pressure loss, a lower layer lap portion 25 and an upper layer lap portion 27 are formed so as not to overlap in a cylindrical axis direction X. Through this, an exhaust gas purification catalyst that can exhibit appropriate purification performance according to the operating status of the internal combustion engine can be provided.
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01J 23/63 - Platinum group metals with rare earths or actinides
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
22 contents. Consequently, it is possible to provide an exhaust gas purification catalyst that can exhibit appropriate purification performance according to an operation state of an internal combustion engine.
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01J 23/63 - Platinum group metals with rare earths or actinides
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
2PGMPGMPGM between the lower-layer front portion A and the lower-layer rear portion B is set to 0.8-1.1 from the standpoint of attaining both OSC performance and warming performance. It is thus possible to provide a catalyst for exhaust gas purification which can exhibit adequate purification performance in accordance with the working condition of an internal combustion engine.
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01J 23/63 - Platinum group metals with rare earths or actinides
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
2XXXX-absorbing material and Pt is formed in the exhaust gas purification catalyst on the side closer to a partition wall 14 than the upper-layer catalyst layer 24. This makes it possible to provide an exhaust gas purification catalyst that is capable of exhibiting suitable purification performance in accordance with the operating status of an internal combustion engine.
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01J 23/63 - Platinum group metals with rare earths or actinides
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
2CDCD, as determined through the observation with an electron microscope, of 2-5 μm inclusive. It is thus possible to provide an exhaust gas purification catalyst which can exhibit adequate purification performance depending on the working condition of an internal combustion engine.
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01J 23/63 - Platinum group metals with rare earths or actinides
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
a of the partition 16; and an upper layer 24 provided to cover the lower layer 22. The mean particle diameter of granules contained in the upper layer 24 is higher than the mean particle diameter of granules contained in the lower layer. The mean particle diameter of the granules in the lower layer 22 is from 0.4 μm to 2.0 μm inclusive, and the mean particle diameter of the granules in the upper layer 24 is from 2.0 μm to 7.0 μm inclusive. With such a configuration, PM can be captured in an inlet cell 12, thereby suitably avoiding PM from passing toward an outlet cell 14 and exhibiting an excellent PM capturing performance.
F01N 3/035 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors
B01D 39/20 - Other self-supporting filtering material of inorganic material, e.g. asbestos paper or metallic filtering material of non-woven wires
B01D 46/24 - Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01J 23/63 - Platinum group metals with rare earths or actinides
B01J 35/56 - Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
F01N 3/022 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
F01N 3/08 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
F01N 3/24 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
The present invention provides an exhaust gas purification catalyst with excellent warm-up characteristics, which can quickly exhibit effective catalytic activity even when exhaust gas in a relatively low temperature range is introduced. In the exhaust gas purification catalyst disclosed herein, a catalyst support portion provided on the base material includes: a catalyst coat portion having a carrier made of inorganic compound particles and at least one catalyst metal in a supported state on the carrier, and a catalyst metal direct support portion having at least one catalyst metal in a directly supported state on the base material without the carrier, the catalyst metal direct support portion is provided in at least an upstream region of a predetermined length from an upstream end in an exhaust gas passage, and the catalyst coat portion is not provided in the upstream region in the exhaust gas passage and is provided only in a downstream region downstream of the upstream region.
According to the present invention, a wall-flow type particulate filter in which pressure loss is suppressed despite a large formation region of a catalyst layer is provided. The particulate filter disclosed herein includes a wall-flow type base material and a catalyst layer formed on the base material. The base material includes an inlet side cell whose only end part on an exhaust gas entry side is open, an outlet side cell whose only end part on an exhaust gas exit side is open, and a partition wall that sections between the inlet side cell and the outlet side cell and includes a plurality of pores communicating between the inlet side cell and the outlet side cell. A first catalyst layer is formed on a surface of the partition wall that is in contact with the inlet side cell. The first catalyst layer is provided in a region over 80% of a total length of the base material from an end part of the base material on the exhaust gas entry side toward an end part thereof on the exhaust gas exit side. In at least a region from a position corresponding to 20% of the total length of the base material to a position corresponding to 80% thereof, from the end part of the base material on the exhaust gas entry side, the first catalyst layer is inclined so that a thickness of the first catalyst layer decreases from the end part on the exhaust gas entry side toward the end part on the exhaust gas exit side.
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
F01N 3/035 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors
Provided is a manufacturing device with which, with respect to a base material having a flange part, the adhesion of a slurry onto the flange part of can be suppressed, and the generation of an uncoated section of a honeycomb structural body can be prevented. The disclosed manufacturing device 100 comprises: a holding part 110 that holds a base material 10, the base material comprising a honeycomb structural body 12 and an outer cylinder 11 having a flange part 13; a viscosity modification mechanism 120 that modifies a viscosity of a slurry for catalyst layer formation which is supplied to the base material 10; and a supply part 130 that supplies the slurry to the viscosity modification mechanism 120. The viscosity modification mechanism 120 comprises: a cylindrical partitioning member 122 which has a smaller outer diameter than an inner diameter of the outer cylinder 11; a porous plate 124 in which a plurality of through holes are formed; and a suction member 126 that suctions the slurry for catalyst layer formation from a lower end 10b of the base material 10.
C/SIC COMPOSITE PARTICLES AND THEIR MANUFACTURING METHOD, ELECTRODE CATALYST AND POLYMER ELECTROLYTE FUEL CELL COMPRISING THE C/SIC COMPOSITE PARTICLES
[Problem] To provide a practical solid polymer fuel cell having high cell performance and excellent durability.
[Problem] To provide a practical solid polymer fuel cell having high cell performance and excellent durability.
[Means for solving] The polymer electrolyte fuel cell according to the present invention includes: a membrane electrode assembly in which electrodes each including a catalyst layer are joined to both surfaces of an electrolyte membrane; and a peroxide decomposition catalyst which is fixed to the electrolyte membrane and/or the electrodes and includes a hardly soluble carbide, a boride, and/or a silicide. The peroxide decomposition catalyst preferably contains a carbide, a boride and/or a silicide of a rare earth element, a transition metal element or a typical metal element.
33 purification performance in a cold start after a hydrothermal durability treatment. The exhaust gas purification catalyst disclosed herein comprises a substrate and an exhaust gas purification layer provided on the substrate. The exhaust gas purification layer contains a molecular sieve substantially free of Si and a catalyst metal. The molecular sieve substantially free of Si is metalloaluminophosphate in which a portion of the skeleton is substituted with a metal other than Al.
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
The present invention provides an exhaust gas purification catalyst which is inhibited from being poisoned by phosphorus and has excellent exhaust gas purification performance. The exhaust gas purification catalyst disclosed herein is intended to be used for purifying an exhaust gas discharged from an internal combustion engine. The exhaust gas purification catalyst comprises a base 11, a catalyst layer 20 disposed on the base 11 and comprising a catalytic metal and an OSC material, and a phosphorus-trapping layer 30 disposed on the catalyst layer 20, containing calcium sulfate and/or calcium carbonate as a phosphorus-trapping ingredient, and containing substantially no catalytic metal. The phosphorus-trapping layer 30 extends from the upstream-side end of the base 11 toward the downstream side along the exhaust-gas flow direction.
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
44.
PRODUCTION METHOD FOR EXHAUST GAS PURIFICATION CATALYST
The present invention provides a production method that suppresses the adhesion of a slurry to a flange section when using a substrate with a flange section and suppresses the occurrence of uncoated sections in a honeycomb structure. The production method for an exhaust gas purification catalyst disclosed herein includes: a step in which a substrate 10 comprising a honeycomb structure 12 and an outer cylinder 11 with a flange section 13 is prepared; a step in which the substrate 10 is held so that the cylindrical axis of said substrate 10 substantially coincides with the vertical direction; a step in which a cylindrical partition member 110 having an outer diameter which is smaller than the inner diameter of the outer cylinder 11 is inserted into the outer cylinder 11 from the upper end thereof and the upper end surface of the honeycomb structure 12 and the lower end of the partition member 110 are arranged so as to face each other; a step in which a slurry is supplied to the partition member 110; and a step in which the slurry is suctioned from the lower end of the outer cylinder. The partition member 110 and the substrate 10 are arranged so as to obtain a predetermined clearance in the arrangement step, and the slurry supplied in the supply step is adjusted to a predetermined viscosity.
This foil body feeding device feeds a foil body toward a corrugating unit which applies corrugation. The feeding device comprises: a delivery unit that delivers the foil body in a feeding direction parallel to a pair of lateral edges of the foil body; a first foil body holding member; and a second foil body holding member. The first foil body holding member and the second foil body holding member deliver the foil body situated between the delivery unit and the corrugation unit toward the corrugation unit. The first foil body holding member and the second foil body holding member each have a pressing part that applies a prescribed tensile load to the foil body in the feeding direction while pressing a non-perforated portion of the foil body when moving the foil body in the feeding direction. The pressing part of the first foil body holding member and the pressing part of the second foil body holding member are separated from each other in a direction parallel to the feeding direction.
B21D 13/04 - Corrugating sheet metal, rods or profiles, or bending sheet metal, rods or profiles into wave form by rolling
B21D 47/00 - Making rigid structural elements or units, e.g. honeycomb structures
B65H 23/188 - Registering, tensioning, smoothing, or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
B21D 43/00 - Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profilesAssociations therewith of cutting devices
The present invention provides an exhaust gas purifying catalyst which demonstrates high HC purification performance at a cold start after hydrothermal endurance. The exhaust gas purifying catalyst disclosed herein is provided with a base material, a hydrocarbon adsorption layer, and a catalyst layer. The hydrocarbon adsorption layer and the catalyst layer are stacked upon each other in such a manner that the hydrocarbon adsorption layer is on the base material side. The catalyst layer contains a catalyst metal. The hydrocarbon adsorption layer comprises a molecular sieve, which does not substantially contain Si, from one end to the other end thereof in the flowing direction of an exhaust gas. The content of the molecular sieve, which does not substantially contain Si, in the hydrocarbon adsorption layer is 80% by mass or more. The molecular sieve, which does not substantially contain Si, is an aluminophosphate molecular sieve that has a 12-membered ring.
A tool for a catalyst applicator for applying a catalyst to the metallic honeycomb base of an exhaust gas purification catalyst, the tool having a cylindrical partition member which is flexible and being inserted into a metallic outer cylinder which has a longer axial length than the honeycomb base. The tool is used when applying a catalyst slurry containing a catalyst metal to the honeycomb base supported by the outer cylinder in such a state that the axial direction thereof is vertical. The partition member is disposed so that the outer circumferential surface thereof faces the inner circumferential surface of an outer-cylinder extension, which is a portion of the outer cylinder that protrudes upward from the upper end surface of the honeycomb base. The partition member is disposed so that the lower end thereof is near to the upper end surface of the honeycomb base in order to inhibit the catalyst slurry from coming into contact with the inner circumferential surface of the outer-cylinder extension, when the catalyst slurry is supplied to the upper end surface of the honeycomb base and to the inside of the inner circumferential surface of the partition member.
B01J 37/02 - Impregnation, coating or precipitation
B05C 7/04 - Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work the liquid or other fluent material flowing or being moved through the workApparatus specially designed for applying liquid or other fluent material to the inside of hollow work the work being filled with liquid or other fluent material and emptied
An exhaust gas purification catalyst provides excellent removal performance of methane, which is chemically stable. Exhaust gas purification catalyst includes a substrate that divides cells through which an exhaust gas flows and a catalyst layer that is provided on a surface of the substrate. The catalyst layer includes a palladium layer containing palladium that extends from a first end part which is an end part on the side into which an exhaust gas in the cells flows to a second end part which is an end part on the side from which an exhaust gas flows out, a platinum layer containing platinum that extends from the second end part to the first end part, and a rhodium layer containing rhodium that is laminated with both the palladium layer and the platinum layer.
B01J 23/46 - Ruthenium, rhodium, osmium or iridium
B01J 35/00 - Catalysts, in general, characterised by their form or physical properties
B01J 35/10 - Solids characterised by their surface properties or porosity
F01N 3/20 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl specially adapted for catalytic conversion
The purpose of the present invention is to provide an exhaust gas purification device that can suppress increases in pressure loss. This exhaust gas purification device is characterized by comprising a honeycomb substrate and an inflow-cell-side catalyst, and is characterized in that: the honeycomb substrate comprises a porous partition wall that defines a plurality of cells that extend from an inflow-side end surface to an outflow-side end surface; the plurality of cells include an inflow cell and an outflow cell that are adjacent, with the partition wall sandwiched therebetween; the inflow cell is open at an inflow-side end and sealed at an outflow-side end; the outflow cell is sealed at an inflow-side end and open at an outflow-side end; the inflow-cell-side catalyst is disposed at least on an inflow-cell-side partition wall surface in an inflow-cell-side catalyst region of the partition wall, or in an inflow-cell-side partition wall interior region; and, if a position 50% of the length of the inflow-cell-side catalyst region from an inflow-side end of the partition wall in a direction of extension is considered a reference position, the proportion of a region of the partition wall covered by the inflow-cell-side catalyst in plan view of the inflow-cell-side partition wall surface of the partition wall at the reference position is in the range 50%–95%.
F01N 3/022 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
F01N 3/24 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
F01N 3/035 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors
The exhaust gas purification device includes a substrate, a first catalyst layer, and a second catalyst layer. The substrate includes an upstream end and a downstream end. The first catalyst layer contains first catalyst particles and lies on the substrate across a first region extending between the upstream end and a first position. The first position is at a first distance from the upstream end toward the downstream end. The second catalyst layer contains second catalyst particles and lies on the first catalyst layer across the first region. The second catalyst layer is provided with pores. Pore connectivity of the second catalyst layer is 5% to 35%. A mean value of areas of the pores of the second catalyst layer in a cross-sectional backscattered electron image of the second catalyst layer may be 0.7 μm2 to 9.0 μm2.
Provided is an exhaust gas purification catalyst providing a catalyst performance and an OSC performance at the same time even at low temperature. The present disclosure relates to an exhaust gas purification catalyst including a substrate and a catalyst coating layer coated on the substrate. The catalyst coating layer includes a first catalyst coating layer containing Pd and/or Pt and a second catalyst coating layer containing Rh. The first catalyst coating layer is formed from an end portion in an upstream side with respect to an exhaust gas flow direction in the exhaust gas purification catalyst. The second catalyst coating layer includes an upstream coating layer and a downstream coating layer. Rh in the upstream coating layer and the downstream coating layer are supported on specific carrier particles. Further, a particle diameter of Rh is controlled.
An insulation layer forming-composition including boehmite, a binder, and an organic solvent, wherein when a thermogravimetric analysis is performed on the boehmite and measurement is conducted at a temperature elevation rate of 10° C./min under an air flow, the weight reduction percentage in a range of 200-450° C. is 10.0 mass % or less, and the weight reduction percentage in a range of 450-600° C. is 5.0-13.5 mass %.
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
55.
Ohmic Heating-type Exhaust Gas Purification Catalyst System and Exhaust Gas Purification Method
The present invention provides an ohmic heating-type exhaust gas purification catalyst system. The ohmic heating-type exhaust gas purification catalyst system is configured to perform, based on information of temperature of a catalyst bed input from a temperature detector of an ohmic heating-type exhaust gas purification device, electric current pass control including controls of (1) causing an electric current to pass through a pair of electrodes when the temperature of the catalyst bed is equal to or lower than a first threshold temperature T1 set in a range of 350±25° C., (2) not causing an electric current to pass through the pair of electrodes when the temperature of the catalyst bed exceeds the first threshold temperature T1 and is equal to or lower than a second threshold temperature T2 set in a range of 450±25° C., (3) causing an electric current caused to pass through the pair of electrodes when the temperature of the catalyst bed exceeds the second threshold temperature T2 and is equal to or lower than a third threshold temperature T3 set to be equal to or higher than 550° C., and (4) not causing an electric current to pass through the pair of electrodes when the temperature of the catalyst bed exceeds the third threshold temperature T3.
F01N 3/20 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operationControl specially adapted for catalytic conversion
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01J 23/46 - Ruthenium, rhodium, osmium or iridium
A fuel cell electrode catalyst in which catalytic metal particles made of Pt or a Pt alloy are supported on a carbon carrier, wherein the number of the catalytic metal particles per unit surface area of the carbon carrier is 4.3/100 nm2 to 16.0/100 nm2.
90coatcoat is 30-70%. The outer coat layer 20 having this configuration makes it possible to appropriately suppress an increase in pressure loss and suitably capture particulate matter PM.
F01N 3/022 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
B01D 39/20 - Other self-supporting filtering material of inorganic material, e.g. asbestos paper or metallic filtering material of non-woven wires
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01J 35/10 - Solids characterised by their surface properties or porosity
F01N 3/035 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors
58.
WOUND BODY MANUFACTURING DEVICE, AND WOUND BODY MANUFACTURING METHOD
This wound body manufacturing device for winding a strip-shaped flat plate and a corrugated sheet, arranged overlapping the flat plate, into a roll shape around an axis perpendicular to a conveying direction of the flat plate and the corrugated sheet, comprises: at least one pair of supporting bodies which are spaced apart in the conveying direction of the flat plate and on which the flat plate is placed by being conveyed; a winding shaft which is provided in or above a position between the at least one pair of supporting bodies in the conveying direction, which supports the flat plate that has been placed on the at least one pair of supporting bodies, and which rotates about an axis thereof, thereby winding the flat plate and the corrugated sheet together in a roll shape; and a pulling member which pulls the flat plate toward the at least one pair of supporting bodies on an upstream side and a downstream side of the winding shaft in the conveying direction.
B65H 23/195 - Registering, tensioning, smoothing, or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in winding mechanisms or in connection with winding operations
Particles for an exhaust gas purification catalyst including: inorganic oxide particles; and an inorganic coating layer covering the inorganic oxide particles. The particles for an exhaust gas purification catalyst have reduced cumulative pore volume in a pore diameter range of 0.1-20 μm compared to a cumulative pore volume in a pore diameter range of 0.1-20 μm of inorganic oxide particles before being coated with the inorganic coating layer. Accordingly, the particles for an exhaust gas purification catalyst have a higher thermal conductivity than the inorganic oxide particles before being coated with the inorganic coating layer.
This device for manufacturing a metal base material for exhaust gas purification, which is formed by winding a planar plate and a corrugated plate provided on the planar plate, comprises first and second wind-up shafts, a rotation mechanism, and a movement mechanism. The first wind-up shaft is cantilevered, and has, on the free end side thereof, a first pair of facing pieces defining a first slit and facing each other. The second wind-up shaft is cantilevered, and has, on the free end side thereof, a second pair of facing pieces defining a second slit and facing each other. The rotation mechanism coaxially arranges the rotation axes of the first wind-up shaft and the second wind-up shaft, causes the free ends of the first wind-up shaft and the second wind-up shaft to face each other, arranges at least the planar plate and/or the corrugated plate so as to be insertable into the first slit and the second slit, and rotates the first wind-up shaft and the second wind-up shaft in the same direction in synchronization with each other. The movement mechanism causes the free ends of the first wind-up shaft and the second wind-up shaft to move closer to or away from each other while coaxially arranging the rotation axes of the first wind-up shaft and the second wind-up shaft.
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B65H 23/195 - Registering, tensioning, smoothing, or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in winding mechanisms or in connection with winding operations
An exhaust gas purification catalyst including a BEA-type zeolite, wherein a value of (A1+A2)/A0 calculated using an area A1 of a peak with a peak top between 3,730 cm-1and 3,740 cm-1, an area A2 of a peak with a peak top between 3,720cm-1and 3,725cm-1, and an area A0 of a peak with a peak top between 1978cm-1and 1983cm-1 in FT-IR measurement of the BEA-type zeolite is less than 0.50, and a full width at half maximum of a diffraction peak with 2θ = 22.5 ± 0.1° in XRD measurement of the BEA-type zeolite is 0.30° or less.
B01J 29/70 - Crystalline aluminosilicate zeolitesIsomorphous compounds thereof of types characterised by their specific structure not provided for in groups
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
C01B 39/46 - Other types characterised by their X-ray diffraction pattern and their defined composition
F01N 3/08 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
F01N 3/24 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
62.
EXHAUST GAS PURIFYING CATALYST, AND CATALYST BODY USING SAME
The present invention provides an exhaust gas purifying catalyst which has high purification activity of Rh even when exposed to high temperatures for a long period of time. The exhaust gas purifying catalyst disclosed herein comprises a base material and a catalytic noble metal supported on the base material. The base material comprises La-containing alumina particles and a zirconia coating arranged on the surface of the alumina particles. The catalytic noble metal contains at least Rh. The mass ratio of zirconia in the base material is at least 5 mass%. The average particle diameter of the zirconia coating, as determined by a focused ion beam scanning electron microscope, is less than 100 nm.
The present disclosure provides an exhaust gas purification catalyst with increased catalytic activity. The exhaust gas purification catalyst comprises a metal oxide support and Rh particles supported on the metal oxide support, wherein the metal oxide support is doped with a cation having a higher oxidation number than the cation of the metal oxide support. The metal oxide support may be a SrTiO3 support doped with greater than 0 mol % and 8 mol % or lower Nb, a ZrO2 support doped with 5 mol % to 20 mol % Nb, or an Al2O3 support doped with greater than 0 mol % and 7 mol % or lower Ti.
Provided is an exhaust gas purification system that allows suppressing the emission of carbon monoxide (CO). An exhaust gas purification system includes a three-way catalyst and a particulate filter and a control device. The three-way catalyst and the particulate filter are arranged respectively on an upstream side and a downstream side of an exhaust channel connected to an internal combustion engine. The control device controls the internal combustion engine so as to execute fuel cut during a deceleration operation of the internal combustion engine. The particulate filter includes a honeycomb substrate and an outflow cell side catalyst layer. The honeycomb substrate includes a porous partition wall defining a plurality of cells extending from an inflow side end surface to an outflow side end surface. The plurality of cells include an inflow cell and an outflow cell adjacent across the partition wall. The inflow cell has an open inflow side end and a sealed outflow side end. The outflow cell has a sealed inflow side end and an open outflow side end. The outflow cell side catalyst layer is disposed on an outflow cell side catalyst region extending from an outflow side end to a position apart toward an inflow side of the partition wall along an extending direction.
F01N 13/00 - Exhaust or silencing apparatus characterised by constructional features
F01N 3/022 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
F01N 3/033 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
F01N 3/035 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors
F01N 3/08 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
F01N 3/24 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
65.
EXHAUST GAS PURIFICATION DEVICE AND METHOD FOR MANUFACTURING EXHAUST GAS PURIFICATION DEVICE
The exhaust gas purification device includes: a substrate including an upstream and a downstream ends; a first catalyst layer extending across a first region and containing a first rhodium-containing catalyst and a first cerium-containing oxide, the first rhodium-containing catalyst containing a first metal oxide carrier and first rhodium particles supported on the first metal oxide carrier, a mean of a particle size distribution of the first rhodium particles being 1.5 nm to 18 nm; and a second catalyst layer extending across a second region and containing a second rhodium-containing catalyst containing a second metal oxide carrier and second rhodium particles supported on the second metal oxide carrier, a cerium content in the first catalyst layer based on a volume capacity of the substrate in the first region being higher than a cerium content in the second catalyst layer based on a volume capacity of the substrate in the second region.
This fuel cell electrode catalyst has catalytic metal particles made from Pt or a Pt alloy supported on a carbon carrier, wherein when XRD measurements are taken for the electrode catalyst, the peak intensity ratio of the Pt (111) surface represented by the formula Pt(111) peak intensity ratio = Pt(111) peak intensity/(Pt(111) peak intensity + Pt(200) peak intensity + Pt (220) peak intensity) was 0.626-0.630.
According to the present invention, an exhaust gas purification catalyst that has both a warming performance and a high load performance is provided. By the present invention, provided is the exhaust gas purification catalyst including a base material and a catalyst coated layer. The catalyst coated layer includes a former stage part and a latter stage part. An alumina content X1 in the former stage part per volume of the base material is not more than an alumina content X2 in the latter stage part per volume of the base material A ratio (Y2/Y1) of a coating amount Y2 in the latter stage part per volume of the base material to a coating amount Y1 in the former stage part per volume of the base material satisfies 1.0<(Y2/Y1)≤2.0.
The present embodiment is a catalyst for a fuel cell including: a catalyst metal; and a carrier that supports the catalyst metal, in which an outer surface area of the carrier to an inner surface area of the carrier, which is a ratio between the inner and outer surface areas of the carrier, is 0.56 to 0.69, and a proportion of the catalyst metal supported on an outer surface of the carrier is 23% to 35%.
A catalyst for fuel cells that contains a carbon powder carrier and catalyst particles carried on the carbon powder carrier, the catalyst particles being Pt alloy particles, the catalyst for fuel cells having 0.65 mmol/g or more of hydrophilic groups, and a Pt elution amount when 0.5 g of the catalyst for fuel cells is immersed in 30 ml of a 0.5 mol/L aqueous sulfuric acid solution and retained for 100 hours at room temperature under stirring being 0.625 mg or less per g of the catalyst for fuel cells.
COMCOM of the composition expressed by the ratio (Pt/(Pt + Pd)) of the mass of Pt to the total mass of Pt and Pd in the catalyst noble metal particles is 3.0% by mass or less.
Provided is an exhaust gas purification catalyst having a catalyst performance and an OSC performance in a compatible manner in an air-fuel ratio (A/F) rich atmosphere where HC poisoning is likely to occur. The exhaust gas purification catalyst includes a substrate and a catalyst coating layer coated on the substrate. The catalyst coating layer includes a first catalyst coating layer containing Pd and/or Pt as a catalyst metal and a second catalyst coating layer containing Rh as a catalyst metal. The first catalyst coating layer is formed from an end portion in an upstream side with respect to an exhaust gas flow direction in the exhaust gas purification catalyst. The second catalyst coating layer includes a high specific surface area OSC material having a specific surface area of more than 40 m2/g, a medium specific surface area OSC material having a specific surface area of 4 m2/g to 40 m2/g, and a low specific surface area OSC material having a specific surface area of less than 4 m2/g.
The present invention provides a hydrocarbon adsorption device 10 configured to circulate a fluid and adsorb hydrocarbons in the fluid. The hydrocarbon adsorption device 10 includes a first hydrocarbon adsorption section 20 containing zeolite, and a second hydrocarbon adsorption section 30 which is provided downstream of the first hydrocarbon adsorption section 20 in the flowing direction of the fluid. The pore diameter P1 of the zeolite contained in the first hydrocarbon adsorption section 20 is smaller than the pore diameter P2 of the zeolite contained in the second hydrocarbon adsorption section 30 (i.e., P1
B01J 20/28 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof characterised by their form or physical properties
B01D 53/04 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
An exhaust gas purification catalyst device having a base material, an upstream-side lower coat layer, an upstream-side upper coat layer, a downstream-side lower coat layer, and a downstream-side upper coat layer, the exhaust gas purification catalyst device satisfying conditions (i) and (ii). (i) The concentration of Pt and/or Pd in the upstream-side upper coat layer and the downstream-side lower coat layer is greater than the concentration of Pt and/or Pd in the upstream-side lower coat layer, and is greater than the concentration of Pt and/or Pd in the downstream-side upper coat layer. (ii) The concentration of Rh in the upstream-side lower coat layer and the downstream-side upper coat layer is greater than the concentration of Rh in the upstream-side upper coat layer, and is greater than the concentration of Rh in the downstream-side lower coat layer.
Provided are a method for producing an exhaust gas purification material and a method for manufacturing an exhaust gas purification device that allow efficient removal of a harmful component even after exposure to a high temperature environment. The method for producing the exhaust gas purification material includes the steps, in this order, of: (a) impregnating a metal oxide carrier with a rhodium compound solution; (b) drying the metal oxide carrier impregnated with the rhodium compound solution to obtain a rhodium-containing catalyst containing the metal oxide carrier and rhodium particles supported on the metal oxide carrier; (c) heating the rhodium-containing catalyst at a temperature within a range from 700° C. to 900° C. under an inert atmosphere; and (d) mixing the rhodium-containing catalyst with a material having a basicity higher than a basicity of the metal oxide carrier.
The exhaust gas purification device includes: a substrate including an upstream end through which an exhaust gas is introduced and a downstream end through which the exhaust gas is discharged; a first catalyst layer containing a rhodium-containing catalyst containing a metal oxide carrier and rhodium particles supported on the metal oxide carrier, the first catalyst layer extending across a first region; and a second catalyst layer containing palladium particles and a material having a basicity higher than a basicity of the metal oxide carrier, the second catalyst layer extending across a second region. A mean of a particle size distribution of the rhodium particles is from 1.5 nm to 18 nm.
An exhaust gas-purifying catalyst includes a catalyst-coated filter. The catalyst-coated filter includes a filter substrate and a catalyst layer on a pore wall of the filter substrate. The exhaust gas-purifying catalyst has a first end, a second end, a porous wall, a first cell, and a second cell. The first cell is closed at the second end, the second cell is closed at the first end, and the first cell and the second cell are adjacent to each other with the porous wall interposed therebetween. At a surface of the porous wall on the first cell side, a proportion SS/S of a total area SS of pores having an opening diameter of less than 40 μm in a total area S of all pores is 65% or more.
The present disclosure provides an oxygen storage/release material that has achieved both the improved oxygen storage/release capacity at low temperature and heat tolerance, which comprises a ceria-zirconia-based composite oxide, wherein the ceria-zirconia-based composite oxide further comprises praseodymium (Pr) or neodymium (Nd), and has, in at least a part thereof, at least one ordered phase of κ phase and a pyrochlore phase, a proportion of primary particles having particle diameters of 0.4 μm to 1.5 μm is 40% to 100% on a particle number basis, and, when heated for 5 hours in the air at 1,100° C., I(14/29) value is 0.015 or more and I(28/29) value is 0.08 or less. The present disclosure also relates to a method for producing such oxygen storage/release material.
An exhaust gas-purifying catalyst includes a catalyst-coated filter and inorganic particles in a powder form. The catalyst-coated filter includes a filter substrate and a catalyst layer on a pore wall of the filter substrate. The catalyst-coated filter has a first end portion, a second end portion, a filter wall, an entry-side cell, and an exit-side cell. The filter wall is porous. The entry-side cell is opened at the first end portion and closed at the second end portion. The exit-side cell is opened at the second end portion and closed at the first end portion. The entry-side cell and the exit-side cell are adjacent to each other with the filter wall interposed therebetween. The inorganic particles in a powder form are localized at a surface of the filter wall adjacent to the entry-side cell at a cross section parallel to the thickness direction of the filter wall.
F01N 3/022 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
F01N 3/035 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
79.
METHOD FOR MANUFACTURING EXHAUST GAS PURIFICATION CATALYST DEVICE
A method for manufacturing an exhaust gas purification catalyst device, the method including: (A) disposing a substrate such that open ends on one side of a plurality of cell flow paths face upward and such that open ends on the other side face downward, installing a coating liquid retention tool having a retention wall at the upper-end section of the substrate, and forming a coating liquid retention part; (B) supplying a coating liquid for forming a catalyst coat layer to the coating liquid retention part; (C) reducing the pressure within the cell flow paths to below the pressure of the coating liquid retention part, thereby coating partition walls of the substrate with the coating liquid for forming a catalyst coat layer; (D) spraying the inner side of the retention wall of the coating liquid retention tool with compressed air from above; and (E) firing the substrate coated with the coating liquid for forming a catalyst coat layer, the step (C) and the step (D) being performed simultaneously.
A catalyst for a fuel cell includes a carbon support including a micropore, and a metal supported on the carbon support. The metal is at least one of platinum and a platinum alloy, a specific surface area of the carbon support is 250 m2/g-carbon or more and 338 m2/g-carbon or less, and an area of the micropore of the carbon support is 48 m2/g-carbon or more and 74 m2/g-carbon or less.
To provide a carbon support for catalysts for fuel cells, which increases the power generation performance of fuel cells, a catalyst for fuel cells, a catalyst layer for fuel cells, and a method for producing the carbon support. A carbon support for catalysts for fuel cells, wherein the carbon support includes at least one pore; wherein a thickness of a carbon wall of the carbon support, which is derived from a three-dimensional pore structure of a silica mold obtained by pore volume measurement of the silica mold by nitrogen adsorption analysis, is 3.3 nm or more and 11.2 nm or less; and wherein a carbon wall content is more than 60.3 ml/g and less than 190.8 ml/g.
To provide a carbon support for catalysts for fuel cells, which increases the power generation performance of fuel cells, a catalyst for fuel cells, a catalyst layer for fuel cells, and a method for producing the carbon support. A carbon support for catalysts for fuel cells, wherein the carbon support includes at least one pore; wherein a thickness of a carbon wall of the carbon support, which is derived from a three-dimensional pore structure of a silica mold obtained by pore volume measurement of the silica mold by nitrogen adsorption analysis, is 3.3 nm or more and 11.2 nm or less; and wherein a carbon wall content is more than 60.3 ml/g and less than 190.8 ml/g.
The present disclosure provides technology for suppressing waviness of the loading width of a catalyst metal-loaded part in an exhaust gas purification catalyst. The production method disclosed herein comprises: preparing a base material that has an exhaust gas passage; preparing a catalyst metal solution that contains a catalyst metal which functions as a catalyst that can oxidize or reduce at least one type of exhaust gas component; supplying the catalyst metal solution to a chemical solution plate such that the bottom surface of the chemical solution plate is not exposed; immersing an end part of the base material in the catalyst metal solution supplied to the chemical solution plate and introducing the catalyst metal solution into the exhaust gas passage of the base material; and firing the base material in which the catalyst metal solution has been introduced. Formed in the bottom surface of the chemical solution plate is a groove of a prescribed pattern. The average depth of the groove is 1.2-3 mm. The average width of the groove is 1.6-3 mm.
According to a technique disclosed herein, provided is an exhaust gas purification catalyst, which both suppresses OSC when using a new vehicle and maintains OSC during life cycles. The exhaust gas purification catalyst disclosed herein is an exhaust gas purification catalyst includes a substrate, and a catalyst coated layer formed on the surface of the substrate, wherein the catalyst coated layer contains an OSC material having an oxygen storage capacity. The catalyst coated layer includes a Rh layer mainly containing Rh as a catalyst metal, and a Pd/Pt layer mainly containing Pd and/or Pt as a catalyst metal. At least a portion of the Pd/Pt layer in the catalyst coated layer contains, as the OSC material, a low specific surface area OSC material, including a ceria-zirconia composite oxide and having a specific surface area of 40 m2/g or more and 60 m2/g or less.
Provided is an exhaust gas purification catalyst that includes a base material containing a silicon-silicon carbide composite material and a catalyst layer containing a barium component and that has excellent high-temperature durability of oxygen storage capacity. The exhaust gas purification catalyst disclosed here includes a base material and a catalyst layer in contact with the base material. The base material contains a silicon-silicon carbide composite material. The catalyst layer contains a platinum-group catalyst, a barium component, and an oxygen storage material. The barium component is one material selected from the group consisting of barium and a barium compound. The barium component is present on at least a surface of the oxygen storage material. The barium component has an average particle size of 100 nm or more and 350 nm or less.
B01J 23/58 - Platinum group metals with alkali- or alkaline earth metals or beryllium
B01J 21/06 - Silicon, titanium, zirconium or hafniumOxides or hydroxides thereof
B01J 35/00 - Catalysts, in general, characterised by their form or physical properties
B01D 53/32 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by electrical effects other than those provided for in group
An gas purification catalyst device having a catalyst coated layer formed on at least one base material, wherein: the catalyst coated layer includes a first catalyst coated layer on the upstream side of an exhaust gas flow, and a second catalyst coated layer on the downstream side of the exhaust gas flow; the first catalyst coated layer includes a hydrocarbon adsorbent and a catalytic precious metal; and the second catalyst coated layer includes a nitrogen oxide adsorbent and a catalytic precious metal.
B01J 29/70 - Crystalline aluminosilicate zeolitesIsomorphous compounds thereof of types characterised by their specific structure not provided for in groups
B01J 23/00 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group
The present disclosure provides a manufacturing method for a slurry whereby milling time is shortened. The manufacturing method disclosed herein includes: a material preparation step for preparing a slurry manufacturing material containing a first inorganic oxide powder; a first milling step for milling the slurry manufacturing material using a first milling device provided with a first media until an average particle size, based on a laser diffraction/turbulence method, of the powder contained in the slurry manufacturing material is from 5 μｍ to 13 μｍ; and a second milling step for milling the slurry manufacturing material using a second milling device, provided with a second media for which an average particle size is smaller than that of the first media, until the average particle size, based on the laser diffraction/turbulence method, of the powder contained in the slurry manufacturing material is 1 μｍ or less. Furthermore, prior to the first milling step, or after the first milling step and prior to the second milling step, also included is mixing a second inorganic oxide powder into the slurry manufacturing material.
Provided is an exhaust gas purification catalyst system comprising, in the following order, from the upstream side of an exhaust gas flow: a first exhaust gas purification catalyst apparatus 100 including a metal honeycomb substrate 110 and a first catalyst coat layer 120 on the metal honeycomb substrate 110; a heater 300; and a second exhaust purification catalyst apparatus 200 including a cordierite honeycomb substrate 210 and a second catalyst coat layer 220 on the cordierite honeycomb substrate 210, wherein the first catalyst coat layer 120 contains an adsorbent 130 that can adsorb one or two or more among NOx, HC and CO, and the second catalyst coat layer 220 contains inorganic oxide particles 230 and catalyst precious metal particles 240 supported on the inorganic oxide particles 230.
Provided is an exhaust gas purification catalyst improved in warm-up performance while suppressing HC poisoning of a noble metal in an atmosphere in which an air-fuel ratio (A/F) is rich and the HC poisoning easily occurs. The present disclosure relates to an exhaust gas purification catalyst that includes a substrate and a catalyst coating layer coated on the substrate. The catalyst coating layer includes a lower coating layer coated on the substrate and an upper coating layer coated on the lower coating layer. The lower coating layer contains a noble metal. The upper coating layer contains Pd and/or Pt. The Pd and/or Pt contained in the upper coating layer is supported on A12O3 by a certain amount or more. A thickness of the upper coating layer is adjusted.
Mesoporous carbon includes a linked structure in which carbon particles are linked. The carbon particles have primary pores and are primary particles. An average entrance diameter of the primary pores is 2.0 nm or more and 3.0 nm or less. An average constriction diameter of the primary pores is 1.6 nm or more and 2.4 nm or less. An electrode catalyst for a fuel cell includes the mesoporous carbon and catalyst particles supported in the primary pores of the mesoporous carbon. A catalyst layer includes the electrode catalyst for a fuel cell and a catalyst layer ionomer.
B01J 23/63 - Platinum group metals with rare earths or actinides
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01J 27/055 - Sulfates with alkali metals, copper, gold or silver
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
A honeycomb substrate holder for holding a honeycomb substrate, the honeycomb substrate holder comprising: an elastically deformable cylindrical inner circumferential wall; a cylindrical outer circumferential wall located outside the cylindrical inner circumferential wall with a cylindrical gap from the cylindrical inner circumferential wall; and two end faces sealing the cylindrical gap together with the cylindrical inner circumferential wall and the cylindrical outer circumferential wall, A honeycomb substrate can be inserted on the axial side of the cylindrical inner circumferential wall. Fluid can be circulated or held in the cylindrical gap. The cylindrical inner circumferential wall can be elastically deformed and pressed against an outer circumferential surface of the honeycomb substrate by pressurizing the fluid in the cylindrical gap.
B01J 19/00 - Chemical, physical or physico-chemical processes in generalTheir relevant apparatus
B01J 10/00 - Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particlesApparatus specially adapted therefor
B01J 19/24 - Stationary reactors without moving elements inside
F01N 3/08 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
The present disclosure provides an exhaust gas purifying catalyst that may exhibit high purification performance both in a low temperature state immediately after an engine is started and during a high-load operation. The exhaust gas purifying catalyst disclosed herein contains at least one type of noble metal purifying exhaust gas, and includes a substrate, and a catalyst coat layer formed on a surface of the substrate. The catalyst coat layer is formed to have a stack structure including a lower layer provided on the substrate and an upper layer provided on the lower layer. The lower layer contains a noble metal and an oxide having an oxygen storage capacity. A noble metal-containing surface layer portion containing a noble metal is formed in at least a part of a surface portion of the upper layer. The upper layer does not contain an oxide having the oxygen storage capacity.
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01J 23/63 - Platinum group metals with rare earths or actinides
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
F01N 3/08 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
95.
METHOD FOR MANUFACTURING EXHAUST GAS PURIFICATION CATALYST
The present disclosure provides a method for manufacturing an exhaust gas purification catalyst having a catalyst layer that is highly uniform with respect to a thickness direction of a separating wall. The disclosed method for manufacturing an exhaust gas purification catalyst includes: preparing a base material 10 which has a wall-flow structure and which comprises a first cell having only an end portion on one side open, a second cell having only an end portion on the other side open, and a porous separating wall dividing the first cell and the second cell; supplying a catalyst layer forming material to the end portion of the base material 10 at which the first cell is open, and coating an interior of the separating wall with the catalyst layer forming material, to a predetermined length from the end portion of the base material at which the first cell is open, in an extension direction of the separating wall, so as to form a portion not coated by the catalyst layer forming material, on the end portion side at which the second cell is open, in the extension direction of the separating wall, of a zone of the separating wall facing the first cell; and drying the coated catalyst layer forming material by causing air to flow from the end portion of the base material at which the second cell is open.
B01J 37/02 - Impregnation, coating or precipitation
B01D 53/94 - Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
F01N 3/022 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
F01N 3/035 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
F01N 3/24 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
Provided is an exhaust gas purification catalytic device having a first catalyst coating layer 200 and a second catalyst coating layer 300 on a substrate 100, wherein the first catalyst coating layer 200 includes first inorganic oxide particles 10 and first catalytic noble metal particles 40, the second catalyst coating layer 300 includes second inorganic oxide particles 60 and second catalytic noble metal particles 70, the first inorganic oxide particles 10 include a composite oxide support 30 containing an OSC material 11 and an alkaline earth metal oxide 20, the first catalytic noble metal particles 40 include one or two selected from Pt and Pd, the second inorganic oxide particles 60 include the OSC material 11, the second catalytic noble metal particles 70 include Rh, the first catalyst coating layer 200 is substantially free of Rh, and the second catalyst coating layer 300 is substantially free of Pt, Pd, and alkaline earth metal oxides.
F01N 3/08 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
F01N 3/10 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
F01N 3/24 - Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
The present disclosure provides a method for producing an exhaust gas purification catalyst in which the standby time of a shower nozzle is reduced. The production method disclosed herein includes: a slurry supply step in which a catalyst metal-containing slurry is supplied from a shower nozzle to one end of one honeycomb substrate; a first suction step in which pressurization or decompression is performed toward the other end of the honeycomb substrate using a first suction device in the one honeycomb substrate to which the slurry is supplied and the supplied slurry is pulled into the interior of the honeycomb substrate; and a second suction step in which pressurization or decompression is performed again toward the other end of the honeycomb substrate using a second suction device in the one honeycomb substrate after the first suction step and the supplied slurry is pulled into the interior of the honeycomb substrate. In addition, the slurry supply step and the plurality of suction steps are performed in parallel on the same production line.
The present invention provides an exhaust gas purifying catalyst which has high exhaust gas purification performance at a cold start after a hydrothermal durability treatment. An exhaust gas purifying catalyst disclosed herein is provided with a base material and a catalyst layer that is arranged on the base material. The catalyst layer contains a catalyst metal and a hydrocarbon adsorbent. The hydrocarbon adsorbent contains 80% by mass or more of a molecular sieve that does not substantially contain Si.
