| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for efficiently producing hydrogen while reducing electric energy necessary for electrolysis of water by lowering electrolytic voltage through supplying a hydrocarbon-containing gas to an anode side of an apparatus for electrolyzing high-temperature steam, which has an electrolytic tank partitioned into the anode side and a cathode side with the use of a solid oxide electrolyte of a diaphragm, and through the consequent depolarization action of hydrocarbon, by preventing clogging in an electrode caused by solid-state carbon precipitated by the decomposition of hydrocarbon, and effectively using heat and an unburned gas component contained in an exhaust gas from the anode side after having finished the reaction. SOLUTION: The method for producing hydrogen by electrolyzing the high-temperature steam while decreasing electrolytic voltage through supplying steam to a cathode side of an apparatus for electrolyzing the high-temperature steam, which has an electrolytic tank partitioned into the anode side and the cathode side with the use of the solid oxide electrolyte of the diaphragm, and through supplying a hydrocarbon-containing gas to an anode side to react it with oxygen ions, includes mixing an exhaust gas discharged from the anode side of the electrolytic apparatus into the hydrocarbon-containing gas to be supplied to the anode side of the electrolytic apparatus. COPYRIGHT: (C)2005,JPO&NCIPI
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