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题名: Investigations into the C-4 olefin metathesis over Mo/Al2O3: Effects of support nature and pretreatment conditions on the product distribution
作者: Zhang, Dazhou1, 2;  Li, Xiujie1;  Liu, Shenglin1;  Zhu, Xiangxue1;  Chen, Fucun1;  Xu, Longya1
关键词: Isopentene ;  Olefin metathesis ;  Molybdenum ;  Calcination temperature ;  Reductive treatment
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2014-02-22
DOI: 10.1016/j.apcata.2013.12.019
卷: 472, 页:92-100
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 series of Mo/Al2O3 catalysts were prepared and evaluated in the consecutive metathesis of 1-butene and isobutene. The correlations between the states of Mo species and Metathesis I (2-C-4(=) + 1-C-4(=) -> C-3(=) + 2-Cs), Metathesis II (2-C-4(=) + i-C-4(=) -> C-3(=) + i-C-5(=)) were discussed in detail. It was found that Metathesis I and Metathesis II followed different deactivation rate due to the differences in active sites. Metathesis I was more acidity-sensitive and it was suppressed when alumina was calcined at high temperature due to the decrease of acid sites. Metathesis II kept relative good catalytic stability and high calcination temperature was beneficial to increase the ratio of isopentene in pentene fraction. As revealed by the XPS and reductive pretreatment results, different C-4 olefin molecules on the same Mo-based catalyst exhibited different metathesis activity and partially reduced Mo-v (or Mo-IV) species from octahedrally coordinated Mo(O) species contributed to the selective promotion of Metathesis II. (C) 2013 Elsevier B.V. All rights reserved.
关键词[WOS]: MOLYBDENA-ALUMINA CATALYSTS ;  GAMMA-ALUMINA ;  OXIDATIVE DEHYDROGENATION ;  SILICA-ALUMINA ;  ACTIVE-SITES ;  MOO3/AL2O3 CATALYSTS ;  PROPENE METATHESIS ;  SOL-GEL ;  MO ;  1-BUTENE
语种: 英语
WOS记录号: WOS:000333856200011
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145622
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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Zhang, Dazhou,Li, Xiujie,Liu, Shenglin,et al. Investigations into the C-4 olefin metathesis over Mo/Al2O3: Effects of support nature and pretreatment conditions on the product distribution[J]. APPLIED CATALYSIS A-GENERAL,2014,472:92-100.
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