MANUFACTURE OF CATALYST FOR AMMONIA REGENERATION TYPE HYDROGEN PRODUCTION AND MODIFICATION CONDITION

摘要

PROBLEM TO BE SOLVED: To produce hydrogen from ammonia at low temperatures with high conversion rates by using a multiple body of a nitrogen occluding metal such as iron and an oxide of a rare metal or the like as an ammonia reforming catalyst and to inexpensively regenerate ammonia by occluding nitrogen generated at the time of ammonia reforming in the nitrogen occluding metal in a form of a metal nitride and reacting the occluded nitrogen with hydrogen. SOLUTION: The multiple body of the nitrogen occluding metal such as iron and RxOy (R represents an rare earth metal, a transition metal or an alkaline earth metal) is used as the ammonia reforming catalyst. The nitrogen occluding metal such as iron is used as the storage medium of nitrogen generated in the ammonia decomposition and the stored nitrogen is used as a nitrogen source in the regeneration of ammonia. The activation of iron metal or the like by the oxide and the aggregation of metallic powder in the reaction process are suppressed by combining the nitrogen occluding metal with the oxide of the rare earth metal or the like. The subsequent ammonia regeneration is facilitated by occluding nitrogen generated in the ammonia decomposition in the form of the metal nitride and utilizing the high reactivity of the occluded nitrogen.