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题名: Metathesis of C-4 olefin over Mo-based heterogeneous catalysts: A novel route to propene and isopentene
作者: Zhang, Dazhou1, 2;  Li, Xiujie1;  Liu, Shenglin1;  Huang, Shengjun1;  Zhu, Xiangxue1;  Chen, Fucun1;  Xie, Sujuan1;  Xu, Longya1
关键词: Propene ;  Isopentene ;  Olefin metathesis ;  Mo/Al2O3 ;  Steam treatment
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2012-10-10
DOI: 10.1016/j.apcata.2012.07.002
卷: 439, 页:171-178
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Physical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Environmental Sciences & Ecology
英文摘要: A novel route with high yields of propene and isopentene on the basis of consecutive metathesis of 1-butene and isobutene is proposed. Two series of Mo-based catalysts supported on gamma-Al2O3 and HMOR-Al2O3 composite materials were prepared and evaluated in a fixed bed reactor. Experimental results revealed that three interesting reactions occurred on the catalysts, i.e. 1-C-4(-) -> 2-C-4(-) (Isomerization I), 2-C-4(-)+1-C-4(-) -> C-3(-)+2-C-5(-) (Metathesis I), 2-C-4(-)+i-C-4(-) -> C-3(-)+i-C-5(-) (Metathesis II). Isomerization I was the prerequisite step of the following two metathesis reactions. Metathesis I was more acidity-sensitive and it could happen at low temperatures provided that the catalyst acidity was sufficient. Metathesis II, as the targeted reaction, was proved to be more temperature-sensitive, and high reaction temperatures were preferable for the metathesis of 2-butene and isobutene. 6Mo/Al2O3 exhibited the best catalytic metathesis performance among the candidate catalysts in the consecutive metathesis of 1-butene and isobutene. Furthermore, isopentene selectivity could be highly enhanced through the steam treatment of gamma-Al2O3 support. The modifications of alumina support led to the different distribution of Mo species and the formation of more Mo species in octahedral state may contribute to the preferential activation of Metathesis II. (C) 2012 Elsevier B.V. All rights reserved.
关键词[WOS]: OXIDATIVE DEHYDROGENATION ;  1-BUTENE METATHESIS ;  MOLYBDENA-ALUMINA ;  SILICA-ALUMINA ;  ACTIVE-SITES ;  PROPYLENE ;  DISPROPORTIONATION ;  PROPANE ;  STATE ;  ISOMERIZATION
语种: 英语
WOS记录号: WOS:000308731400020
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143071
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Zhang, Dazhou,Li, Xiujie,Liu, Shenglin,et al. Metathesis of C-4 olefin over Mo-based heterogeneous catalysts: A novel route to propene and isopentene[J]. APPLIED CATALYSIS A-GENERAL,2012,439:171-178.
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