1994 Fiscal Year Final Research Report Summary
NOVEL APPROACH FOR CONTROLLING CATALYTIC SITE FOR LOW-TEMPERATURE STEAM REFORMING
| Project/Area Number |
05650786
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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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) |
1993 – 1994
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| Keywords | Hydrogen Production / Low-Temperature Steam Reforming / Support / High Surface Area Zirconia / Alkoxide / Sol-Gel Processing |
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| Research Abstract |
In order to obtain a high surface area support for the low-temperature steam reforming, ZrO_2 and ZrO_2-Y_2O_3 were prepared by the hydrolytic decomposition of the corresponding isopropoxide dissolved in benzene. The hydrolysis was carried out at 80ﾟC using an excess amount of distillled water in flowing dry nitrogen. The precipotates thus obtained were dried at 100ﾟC followed by calcination at 500ﾟC in air or nitrogen for 1 h. The specific surface areas for both of the ZrO_2 and ZrO_2-Y_2O_3 increased with increasing amount of water added for hydrolysis, and the surface areas for ZrO_2-Y_2O_3 increased with increasing yttrium content. A ZrO_2 having a surface area of 130m^2/g was produced, and a stabilized tetragonal ZrO_2 with 15 mol% Y^<3+> having a surface area of 200m^2/g was produced. Furthermore, despite the difference in the ZrO_2 and ZrO_2-Y_2O_3 crystal structures, the lattice-strain of ZrO_2 has been unequivocally related to the surface area.
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