1996 Fiscal Year Final Research Report Summary
DESIGN OF BIFUNCTIONAL CATALYST FOR LOW-TEMPERATURE HYDROGEN PRODUCTION
| Project/Area Number |
07650942
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
触媒・化学プロセス
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| Research Institution | KOGAKUIN UNIVERSITY |
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Principal Investigator |
IGARASHI Akira KOGAKUIN UNIV., FAC.ENG., PROFESSOR, 工学部, 教授 (90005538)
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| Co-Investigator(Kenkyū-buntansha) |
FUKUHARA Chouji KOGAKUIN UNIV., FAC.ENG., RESEARCH ASSOCIATE, 工学部, 助手 (30199260)
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| Project Period (FY) |
1995 – 1996
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| Keywords | Hydrogen Production / Steam Reforming / Zirconia Support / Rhodium |
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| Research Abstract |
In order to obtain a catalyst with high reactivity for hydrogen production by steam reforming, studies on the catalyst preparation and the reaction mechanism were carried out.
First, ZrO_2 and ZrO_2-Y_2O_3 with a high specific surface area were produced by the sol-gel method. Rhodium particle sizes of Rh/ZrO_2-Y_2O_3 catalysts prepared by the impreganation method decreased linearly with increasing specific surface areas of ZrO_2-Y_2O_3 supports. Rh/ZrO_2-Y_2O_3 catalysts showed superior performance for the steam reforming of n-butane and the catalyic activity related to rhodium particle size.
Further, in situ DRIFT and TPD experiments were made to investigate the reaction mechanism of low-temperature steam reforming over Rh/ZrO_2 catalyst. It was found that the reaction intermediate was formate species. Formate species over Rh/ZrO_2 catalyst was consumed with reaction at low temperature. It was also found the basic surface hydroxyl groups had high reactivity. The superior performance of Rh/ZrO_2 catalyst obtained by using the flow experiment seemed to be responsible for the acid-base property of this catalyst.
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