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AssigneeKernforschungsanlage Julich Gesellschaft mit beschrankter Haftung
InventorsBernd D. Struck, Robert Junginger, Dagmar Boltersdorf
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A reduction of the voltage across the electrolysis cell in which hydrogen is produced in the sulfuric acid hybrid closed cycle process by use of an electrolysis cell having an intermediate chamber between the anode and cathode chamber through which a separate electrolyte is caused to flow, is obtainable under operation with the electrolytes in both the cathode and the anode chambers having a concentration of sulfuric acid by weight of about 50% or more. It is found that the undesired formation of hydrogen sulfide and of sulfur remains at a tolerable small level if the catholyte is continuously renewed. A low specific resistance cation membrane is preferably used between the cathode and intermediate chambers, as well as between the anode and intermediate chambers.
A process for electrolytic production of hydrogen in which hydrogen is cathodically evolved and sulfurous acid is anodically oxidized to sulfuric acid, utilizing an electrolyzer in which the anode chamber is separated from the cathode chamber by an intermediate chamber which is separated from the cathode chamber by a cation exchange membrane and from the anode chamber by a porous diaphragm, in which method a separating electrolyte is caused to flow through said intermediate chamber, and separate anodic and cathodic electrolytes are caused to flow respectively through the anode and cathode chambers, said method incorporating the improvement which consists in that:
A process for electrolytic production of hydrogen in which hydrogen is cathodically evolved and sulfurous acid is anodically oxidized to sulfuric acid, utilizing an electrolyzer in which the anode chamber is separated from the cathode chamber by an intermediate chamber which is separated by cation exchange membranes respectively from the cathode chamber and from the anode chamber, in which method a separating electrolyte is caused to flow through said intermediate chamber, and separate anodic and cathodic electrolytes are caused to flow respectively through the anode and cathode chamber, said method incorporating the improvement which consists in that:
Dependencies are inferred from the claim text.