| Project/Area Number |
12650775
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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 | CHIBA UNIVERSITY |
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Principal Investigator |
SATO Satoshi Chiba University, Faculty of Engineering, Department of Materials Technology, Associate Professor, 工学部, 助教授 (30187190)
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| Co-Investigator(Kenkyū-buntansha) |
TAKAHASHI Ryoji Chiba University, Faculty of Engineering, Department of Materials Technology, Assistant, 工学部, 助手 (80292663)
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2001: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2000: ¥2,800,000 (Direct Cost: ¥2,800,000)
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| Keywords | organic-inorganic complex / citric acid / silica gel / macropore / pore-size control / high surface area / diffusion coefficient / pore diffusion / カーボン析出 / ラネーニッケル |
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| Research Abstract |
We have investigated organic-inorganic complexes for solid catalyst precursors. Thermal decomposition of the Complex is examined in various kinds of solid catalyst. We have found significant results in the use of organic-inorganic complex precursors. (1) Supported-metal catalysts such as Ni-MgO, Ni-SiO_2, and Cu-SiO_2, are prepared using citric acid and poly(ethylene oxide). The use of organic compounds heightens dispersion of metal species on the oxide supports. Also, the organic compounds effectively work as pore-regulating reagents. We can control the size in mesopores of the samples. In addition, we obtained significant diffusion coefficient data of metal ions in liquid phase in the mesopores. It is valuable for evaluating time needed for absorption and washing in the preparation process. (2) Oxides such as silica and titania with high surface area and controlled pore size are prepared using carboxylic acid. The model of pore formation has been discussed : the organic compounds work as pore-regulating reagents in different mechanisms. The former works as simple template, and the latter works as an obstacle for sintering during calcination. (3) Phase separation, induced by spinodal decomposition using organic polymer and silicate species, is adopted for the preparation of oxides such as silica, silica-zirconia, and silica-alumina with bimodal pore structure, which contains mesopores and macropores.
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