Synthesis of C_<2+> Alcohols from Syngas over Supported Metal Catalysts Containing Small Amounts or Rh
| Project/Area Number |
05650784
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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 | KYUSHU UNIVERSITY |
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Principal Investigator |
KISHIDA Masahiro Kyushu Univ., Faculty of Engineering, Research Associate, 工学部, 助手 (60243903)
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| Co-Investigator(Kenkyū-buntansha) |
NAGATA Hideo Kyushu Univ., Faculty of Engineering, Research Associate, 工学部, 助手 (70221463)
WAKABAYASHI Katsuhiko Kyushu Univ., Faculty of Engineering, Professor, 工学部, 教授 (20220832)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1994: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1993: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | CO Hydrogenation / Lower Alcohols / Ir-Mo-Rh catalyst / Novel Catalyst Preparation / Low Rh Content |
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| Research Abstract |
Monometallic catalysts, Ir and Mo, were extremely low in activity and yielded hydrocarbon as main products. On the other hand, Ir-Mo bimetallic catalyst exhibited an high activity, and an increase in the selectivity to the C_<2+> alcohols was observed on the bimetallic catalyst. Mo dioxide was formed in the Mo monometallic catalyst while Mo metal was formed in the Ir-Mo catalyst. This suggests that Mo was reduced with hydrogen species migrated from Ir metal. From the TPR experiment, it was suggested that CO adsorbed on Ir also migrates onto Mo, and that CO and hydrogen reacted over Mo metal.
It was found that Ir-Mo-Rh supported on silica containing small amounts of Rh exhibited much higher activity for Co hydrogenation than Ir-Mo bimetallic catalyst. The selectivity to various alcohols did not change very much upon the addition of Rh. The activity was greatly affected by the impregnation procedure of the metals in the catalyst preparation. The increase of selectivity to C_<2+> alcohols was investigated, and it was found that use of zirconia support and the addition of Li enhanced the selectivity of C_<2+> alcohols.
We proposed a novel preparation method of supported metal catalysts using microemulsions. It was found that silica-supported Rh catalyst prepared by this method had extremely small rhodium particles, and that their size distribution was appreciably narrow. This catalyst exhibited much higher activity for the CO hydrogenation than the conventional catalysts prepared by impregnation, and showed high selectivity to C_<2+> alcohols as well as the conventional catalysts.
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Report
(2 results)
Research Products
(5 results)
