The present invention relates to a solid oxide cell (SOC) system, comprising: an SOC including a fuel/steam electrode and an air electrode with an inlet for a dehumidifed process air stream and an outlet for an exhaust gas stream, a desiccant dehumidifier, an air recuperator, and an optional afterburner for the exhaust gas streams of the air electrode and the fuel/steam electrode; wherein the desiccant dehumidifier comprises a first inlet for a process air stream, a second inlet for a regeneration gas stream, a first outlet in fluid communication with the inlet of the air electrode, and a second outlet for an air exhaust stream, and is configured to dehumidify a process air stream entering the first inlet and to release a dehumidified process air stream via the first outlet; wherein the air recuperator is configured to exchange heat between the dehumidified process air stream exiting the desiccant dehumidifier and the exhaust gas stream exiting the air electrode or the exhaust gas stream exiting the optional afterburner, thereby providing a cooled exhaust gas stream; and wherein the second inlet of the desiccant dehumidifier is in fluid communication with the outlet of the air electrode, and the cooled exhaust gas stream is configured as regeneration gas stream entering the desiccant dehumidifier via second inlet at a temperature suitable for regeneration of the desiccant dehumidifier, or wherein the system further comprises an air blower configured to introduce ambient air, and a heat exchanger configured to exchange heat between the cooled exhaust gas stream and the ambient air, thereby providing heated ambient air stream which serves as the regeneration gas stream. The SOC system enables improved thermal management, energy efficiency and resistance towards cell degradation during electrolysis and/or fuel cell operation.
H01M 8/04014 - Heat exchange using gaseous fluidsHeat exchange by combustion of reactants
C01B 3/04 - Production of hydrogen or of gaseous mixtures containing hydrogen by decomposition of inorganic compounds, e.g. ammonia
H01M 8/04119 - Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyteHumidifying or dehumidifying
H01M 8/0662 - Treatment of gaseous reactants or gaseous residues, e.g. cleaning
This invention relates a non-sintered green sheet or tape comprising a corrugated surface having alternating crests and troughs arranged along both a first direction of the surface and a second direction of the surface, the second direction forming an angle of between 60° to 120° to the first direction, wherein the corrugation periods and/or corrugation amplitudes in the first direction differ from those in the second direction. The invention enables preparation of a reliable, large-sized ceramic sheet material, e.g. as a ceramic electrolyte layer for use in solid oxide cells, as a ceramic sheet for filter or membrane applications, or as sintering substrate or setter. In addition, sintered ceramic sheets and electrolytes, methods of preparation, and solid oxide cells (SOCs) making use of the non-sintered green sheet or tape are described.
The present invention relates to a power converter system for a plurality of electrolysis cell stack units, comprising: a parallel arrangement of multiple DC/DC converter modules;
The present invention relates to a power converter system for a plurality of electrolysis cell stack units, comprising: a parallel arrangement of multiple DC/DC converter modules;
wherein each DC/DC converter module is configured to power a single electrolysis cell stack unit; and wherein each DC/DC converter module is capable of supplying the electrolysis cell stack unit with a predetermined variation of current, power and/or voltage such that near-thermoneutral operation at part load is enabled by matching the integral Joule heat production with the integral reaction heat consumption inside the electolysis cell stack unit, and/or wherein each DC/DC converter module is capable of reversing the current supplied to said electrolysis cell stack unit, causing said electrolysis cell stack unit to perform in fuel cell mode. The power converter system enables facilitated and inexpensive power distribution, long lifetime, as well as improved thermal management during operation of the electrolysis cell stacks. In further aspects, the invention relates to a power distribution system and electrolysis plant comprising said power converter system, as well as to related methods.
This invention relates to system for the production of ammonia synthesis gas, comprising: one or more electrically driven air separation unit(s) configured to separate nitrogen from air; and one or more solid oxide electrolysis cell(s) configured to produce hydrogen by solid oxide electrolysis of steam in thermoneutral or endothermal mode. By configuring the electrically driven air separation unit(s) and the solid oxide electrolysis cell(s) so that heat emanating from the one or more electrically driven air separation unit(s) is transferred to the one or more solid oxide electrolysis cell(s), nitrogen production may be integrated while enabling high current density, the use of large SOEC stacks and improved reactant conversion. In addition, ammonia production plants comprising the above system as well as related methods are described.
C25B 9/00 - Cells or assemblies of cellsConstructional parts of cellsAssemblies of constructional parts, e.g. electrode-diaphragm assembliesProcess-related cell features
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
This invention relates a non-sintered green sheet or tape comprising a corrugated surface having alternating crests and troughs arranged along both a first direction of the surface and a second direction of the surface, the second direction forming an angle of between 60° to 120° to the first direction, wherein the corrugation periods and/or corrugation amplitudes in the first direction differ from those in the second direction. The invention enables preparation of a reliable, large-sized ceramic sheet material, e.g. as a ceramic electrolyte layer for use in solid oxide cells, as a ceramic sheet for filter or membrane applications, or as sintering substrate or setter. In addition, sintered ceramic sheets and electrolytes, methods of preparation, and solid oxide cells (SOCs) making use of the non- sintered green sheet or tape are described.
B28B 3/16 - Producing shaped articles from the material by using pressesPresses specially adapted therefor wherein one or more rollers exert pressure on the material with co-operating profiled rollers
B28B 11/08 - Apparatus or processes for treating or working the shaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
H01M 8/124 - Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte
6.
CORRUGATED GREEN SHEETS FOR THE PREPARATION OF LARGE-SIZED CERAMIC SHEETS AND RELATED METHODS AND USES
This invention relates a non-sintered green sheet or tape comprising a corrugated surface having alternating crests and troughs arranged along both a first direction of the surface and a second direction of the surface, the second direction forming an angle of between 60° to 120° to the first direction, wherein the corrugation periods and/or corrugation amplitudes in the first direction differ from those in the second direction. The invention enables preparation of a reliable, large-sized ceramic sheet material, e.g. as a ceramic electrolyte layer for use in solid oxide cells, as a ceramic sheet for filter or membrane applications, or as sintering substrate or setter. In addition, sintered ceramic sheets and electrolytes, methods of preparation, and solid oxide cells (SOCs) making use of the non- sintered green sheet or tape are described.
B28B 11/08 - Apparatus or processes for treating or working the shaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
H01M 8/124 - Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte
B28B 3/16 - Producing shaped articles from the material by using pressesPresses specially adapted therefor wherein one or more rollers exert pressure on the material with co-operating profiled rollers
The present invention relates to a power converter system for a plurality of electrolysis cell stack units, comprising: a parallel arrangement of multiple DC/DC converter modules; wherein each DC/DC converter module is configured to power a single electrolysis cell stack unit; and wherein each DC/DC converter module is capable of supplying the electrolysis cell stack unit with a predetermined variation of current, power and/or voltage such that near-thermoneutral operation at part load is enabled by matching the integral Joule heat production with the integral reaction heat consumption inside the electrolysis cell stack unit, and/or wherein each DC/DC converter module is capable of reversing the current supplied to said electrolysis cell stack unit, causing said electrolysis cell stack unit to perform in fuel cell mode. The power converter system enables facilitated and inexpensive power distribution, long lifetime, as well as improved thermal management during operation of the electrolysis cell stacks. In further aspects, the invention relates to a power distribution system and electrolysis plant comprising said power converter system, as well as to related methods.
H01M 8/0656 - Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants by electrochemical means
H01M 8/12 - Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
H01M 8/18 - Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
H01M 8/249 - Grouping of fuel cells, e.g. stacking of fuel cells comprising two or more groupings of fuel cells, e.g. modular assemblies
The present invention relates to a power converter system for a plurality of electrolysis cell stack units, comprising: a parallel arrangement of multiple DC/DC converter modules; wherein each DC/DC converter module is configured to power a single electrolysis cell stack unit; and wherein each DC/DC converter module is capable of supplying the electrolysis cell stack unit with a predetermined variation of current, power and/or voltage such that near-thermoneutral operation at part load is enabled by matching the integral Joule heat production with the integral reaction heat consumption inside the electrolysis cell stack unit, and/or wherein each DC/DC converter module is capable of reversing the current supplied to said electrolysis cell stack unit, causing said electrolysis cell stack unit to perform in fuel cell mode. The power converter system enables facilitated and inexpensive power distribution, long lifetime, as well as improved thermal management during operation of the electrolysis cell stacks. In further aspects, the invention relates to a power distribution system and electrolysis plant comprising said power converter system, as well as to related methods.
H01M 8/04298 - Processes for controlling fuel cells or fuel cell systems
H01M 8/04007 - Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
H01M 8/0656 - Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants by electrochemical means
H01M 8/18 - Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
C25B 9/70 - Assemblies comprising two or more cells
C25B 15/023 - Measuring, analysing or testing during electrolytic production
9.
ELECTROLYSIS SYSTEM WITH CONTROLLED THERMAL PROFILE
This invention relates to a system comprising one or more electrolysis cell(s) and at least one power electronic unit that supplies the cell(s) with a fluctuating voltage, and to a method for operating one or more electrolysis cell(s), comprising providing one or more voltage fluctuations to the electrolysis cell(s) by at least one power electronic unit, enabling the provision of a low-cost electrolysis system which simultaneously allows for fast-response dynamic operation, improved electrolysis efficiency, increased lifetime and high impurity tolerance.
C25B 9/65 - Means for supplying currentElectrode connectionsElectric inter-cell connections
H01M 8/0656 - Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants by electrochemical means
10.
SYSTEMS AND METHODS FOR GENERATING SYNTHESIS GAS FOR AMMONIA PRODUCTION
This invention relates to system for the production of ammonia synthesis gas, comprising: one or more electrically driven air separation unit(s) configured to separate nitrogen from air; and one or more solid oxide electrolysis cell(s) configured to produce hydrogen by solid oxide electrolysis of steam in thermoneutral or endothermal mode. By configuring the electrically driven air separation unit(s) and the solid oxide electrolysis cell(s) so that heat emanating from the one or more electrically driven air separation unit(s) is transferred to the one or more solid oxide electrolysis cell(s), nitrogen production may be integrated while enabling high current density, the use of large SOEC stacks and improved reactant conversion. In addition, ammonia production plants comprising the above system as well as related methods are described.
This invention relates to a system comprising one or more electrolysis cell(s) and at least one power electronic unit that supplies the cell(s) with a fluctuating voltage, and to a method for operating one or more electrolysis cell(s), comprising providing one or more voltage fluctuations to the electrolysis cell(s) by at least one power electronic unit, enabling the provision of a low-cost electrolysis system which simultaneously allows for fast-response dynamic operation, improved electrolysis efficiency, increased lifetime and high impurity tolerance.
This invention relates to a system comprising one or more electrolysis cell(s) and at least one power electronic unit that supplies the cell(s) with a fluctuating voltage, and to a method for operating one or more electrolysis cell(s), comprising providing one or more voltage fluctuations to the electrolysis cell(s) by at least one power electronic unit, enabling the provision of a low-cost electrolysis system which simultaneously allows for fast-response dynamic operation, improved electrolysis efficiency, increased lifetime and high impurity tolerance.
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