2012 Fiscal Year Final Research Report
C-C bond scission of carbocations in zeolite pore cavity showing enzyme-like recognition
| Project/Area Number |
23655122
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Functional materials chemistry
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
BABA Toshihide 東京工業大学, 大学院・総合理工学研究科, 教授 (50165057)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 分子認識・ゼオライト触媒機能 / コンセプト |
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| Research Abstract |
The conversions of C_2H_4 , pentenes, and hexenes were examined. The catalytic performance was compared, in order to investigate the role of the pore volume of zeolites with8-, 10-, and 12-membered rings in the selective production of C_3H_6 . The selectivity for C_3H_6 was crucially dependent upon the pore volume of the zeolite. Highly selective production of C_3H_6 from olefins (C_2H_4,pentenes, and hexenes) can be accomplished by employing a new concept: adjusting the pore volume of a zeolite to accommodate the volume of an olefin and/or its carbenium cations, as opposed to a conventional molecular sieve approach. For example, an unimolecular cracking of pentenes into C_3H_6 and C_2H_4 involving primary cations can be controlled by the pore volume of a zeolite.Furthermore, the reaction mechanism for the production of C_3H_6 from C_2H_4 was also investigated. C_3H_6 was produced by the β-scission of the same specific octyl carbocations in the conversions of both butene and C_2H_4.
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