HYDROGEN GENERATING APPARATUS AND HYDROGEN GENERATING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a hydrogen generating apparatus for effectively generating hydrogen from ammonia.

SOLUTION: The hydrogen generating apparatus (51) for generating hydrogen from ammonia comprises an ammonia oxidation part (10) having ammonia oxidation catalysts (11a, 11b) which oxidize ammonia, and an ammonia decomposition part (20) having an ammonia decomposition catalyst (21) which decomposes ammonia to generate nitrogen and hydrogen. The decomposition part is located downstream of the oxidation part in the direction of feed gas flow. (i) The oxidation catalyst contains both a noble metal catalyst and a base metal catalyst, and loading concentration of the noble metal catalyst in the upstream portion of the oxidation part is higher than loading concentration of the noble metal catalyst in the downstream portion of the oxidation part; and/or (ii) the decomposition catalyst contains both a noble metal catalyst and a base metal catalyst, and loading concentration of the noble metal catalyst in the downstream portion of the decomposition part is higher than loading concentration of the noble metal catalyst in the upstream portion of the decomposition part.

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