| Project/Area Number |
21246120
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Catalyst/Resource chemical process
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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) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥47,190,000 (Direct Cost: ¥36,300,000、Indirect Cost: ¥10,890,000)
Fiscal Year 2011: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
Fiscal Year 2010: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Fiscal Year 2009: ¥30,030,000 (Direct Cost: ¥23,100,000、Indirect Cost: ¥6,930,000)
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| Keywords | 触媒反応 / 触媒 / プロピレン合成 / ゼオライト / オレフィン / 反応機構 / プロピレン / β切断 / 細孔空洞容積 / 細孔入り口径 / エチレン / ブテン / オクテン |
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| Research Abstract |
A plausible reaction mechanism for propylene (C_3H_6) production from ethylene (C_2H_4) was investigated, based on the amounts of effluent hydrocarbons and hydrocarbons produced in the pores of various zeolites. Propylene was produced via an oligomerization-cracking mechanism. On the basis of this mechanism, 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 with 8-, 10-, and 12-membered rings in the selective production of C_3H_6 . The selectivity for C_3 H_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_3 H_6 and C_2 H_4 involving primary cations can be controlled by the pore volume of a zeolite.
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