The invention relates to a process for preparing alkali carbonate/bicarbonate salts, comprising continuously feeding aqueous alkali hydroxide solution into a gas-liquid contactor; forcing incoming CO2-containing gas stream through a sparging device submerged in the gas-liquid contactor below the surface level of the aqueous alkali hydroxide solution, to generate bubbles and/or microbubbles; adding hydrogen peroxide in proximity to orifices of the sparging device, from which the bubbles and/or microbubbles evolve, wherein the supply of hydrogen peroxide is adjusted to decrease alkali carbonate formation and increase alkali bicarbonate formation; and continuously discharging an effluent from the gas-liquid contactor and recovering therefrom carbonate and bicarbonate alkali salts predominated by the bicarbonate component. A gas liquid-contactor and an apparatus are also provided by the invention.
The invention relates to a cylindrically-shaped air purifier for eliminating chemical and biological pollutant s from a room, comprising : (a) a reactor section containing a solution reservoir; (b) a utility section; (c) mechanism for sucking contaminated air from the room, creating an airflow through the reactor towards an outlet leading purified air back to the room; and (d) a cylindrically shaped cartridge for periodically feeding liquid and solid ingredient s into the solution reservoir, said cartridge comprising a plurality of concentric sub- cartridges : (i) one or more liquid sub-cartridges, each configured to contain a liquid ingredient, respectively; and (ii) a solid sub-cartridge configured to contain a plurality of solid tablet s said solid sub-cartridge comprising a plurality column cylinders arranged along the periphery of the cartridge, each column cylinder configured to contain a plurality of tablets; and (e) a tablet release mechanism configured to periodically revolve said solid sub-cartridge thereby to position a selected column at a releasing position, and to release a single tablet towards said solution reservoir.
B01D 53/72 - Organic compounds not provided for in groups , e.g. hydrocarbons
B81C 1/00 - Manufacture or treatment of devices or systems in or on a substrate
F24F 11/72 - Control systems characterised by their outputsConstructional details thereof for controlling the supply of treated air, e.g. its pressure
F24F 8/108 - Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
F24F 8/133 - Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using wet filtering by direct contact with liquid, e.g. with sprayed liquid
F24F 8/15 - Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
4.
SYSTEM FOR INCREASING AWARENESS OF A COMPUTER USER
A61B 5/00 - Measuring for diagnostic purposes Identification of persons
A61B 8/00 - Diagnosis using ultrasonic, sonic or infrasonic waves
A61B 5/1455 - Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value using optical sensors, e.g. spectral photometrical oximeters
5.
METHOD AND APPARATUS FOR PURIFYING AIR FROM BIOLOGICAL AGENTS AND VOLATILE ORGANIC COMPOUNDS
A method for improving indoor air quality in a room, comprising drawing air from the room and guiding the air into a gas/liquid contactor charged with aqueous alkali hydroxide/H2O2 solution, passing the air through a perforated membrane installed in the gas/liquid contactor below the surface level of the aqueous alkali hydroxide/H2O2 solution, such that bubbles produced travel through said solution, and getting treated air with improved quality from said gas/liquid contactor, said treated air is characterized by having: reduced carbon dioxide levels; and/or reduced VOC levels; and/or reduced microbiological load. An air purifier to carry out the method is also provided.
F24F 8/133 - Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using wet filtering by direct contact with liquid, e.g. with sprayed liquid
B01D 53/78 - Liquid phase processes with gas-liquid contact
F24F 8/15 - Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
6.
A PROCESS AND APPARATUS FOR PRODUCING ALKALI BICARBONATES AND ALKALI CARBONATES
22-containing gas stream through a sparging device submerged in the gas-liquid contactor below the surface level of the aqueous alkali hydroxide solution, to generate bubbles and/or microbubbles; adding hydrogen peroxide in proximity to orifices of the sparging device, from which the bubbles and/or microbubbles evolve, wherein the supply of hydrogen peroxide is adjusted to decrease alkali carbonate formation and increase alkali bicarbonate formation; and continuously discharging an effluent from the gas-liquid contactor and recovering therefrom carbonate and bicarbonate alkali salts predominated by the bicarbonate component. A gas quid-contactor and an apparatus are also provided by the invention.
22 222solution, such that bubbles produced travel through said solution, and getting treated air with improved quality from said gas/liquid contactor, said treated air is characterized by having: reduced carbon dioxide levels; and/or reduced VOC levels; and/or reduced microbiological load. An air purifier to carry out the method is also provided.
F24F 8/15 - Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
F24F 3/00 - Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatmentApparatus specially designed for such systems
F24F 8/10 - Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
F24F 11/72 - Control systems characterised by their outputsConstructional details thereof for controlling the supply of treated air, e.g. its pressure
B01D 53/00 - 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
B01D 53/14 - 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 absorption
Yissum Research Development Company of the Hebrew University of Jerusalem Ltd. (Israel)
Inventor
Maayan, Marat
Stoin, Uri
Sasson, Yoel
Weinfeld, Doron
Abstract
An air treatment unit may include an air inlet to receive a flow of input air for treatment and a reaction reservoir configured to hold an aqueous air treatment solution. The air treatment unit may also include an air dispersing element flow connected with the air inlet, wherein the air dispersing element is configured to convert at least a portion of the flow of input air into a plurality of microbubbles for introduction into the aqueous air treatment solution, such that an amount of one or more target gas species contained within the plurality of microbubbles is reduced through reaction with the aqueous air treatment solution. The unit may include an air outlet configured to output treated air from the reaction reservoir.
YISSUM RESEARCH DEVELOPMENT COMPANY OF THE HEBREW UNIVERSITY OF JERUSALEM LTD. (Israel)
AIROVATION TECHNOLOGIES LTD (Israel)
Inventor
Maayan, Marat
Stoin, Uri
Sasson, Yoel
Weinfeld, Doron
Abstract
An air treatment unit may include an air inlet to receive a flow of input air for treatment and a reaction reservoir configured to hold an aqueous air treatment solution. The air treatment unit may also include an air dispersing element flow connected with the air inlet, wherein the air dispersing element is configured to convert at least a portion of the flow of input air into a plurality of microbubbles for introduction into the aqueous air treatment solution, such that an amount of one or more target gas species contained within the plurality of microbubbles is reduced through reaction with the aqueous air treatment solution. The unit may include an air outlet configured to output treated air from the reaction reservoir.
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