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题名: Metathesis of ethene and 2-butene to propene on W/Al2O3-HY catalysts with different HY contents
作者: Huang, SJ;  Liu, SL;  Xin, WJ;  Bai, J;  Xie, SJ;  Wang, QX;  Xu, LY
关键词: metathesis ;  ethene ;  2-butene ;  propene ;  10W/Al2O3-xHY catalysts
刊名: JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
发表日期: 2005-02-01
DOI: 10.1016/j.molcata.2004.09.026
卷: 226, 期:1, 页:61-68
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Catalysts containing 10wt.% W were prepared using Al2O3-HY mixed supports with various HY contents. The catalytic performance of these catalysts for the metathesis of ethene and 2-butene to propene was determined in a fixed-bed flow reactor at 180degreesC under 0.1 MPa. The 2-butene conversion of these catalysts increases remarkably with the HY content in the range of 0-30 Between 30 and 70wt.% of HY content, the conversion reaches a plateau of 60-63%, which is very close to the thermodynamic equilibrium value of similar to64%. After that, the 2-butene conversion decreases substantially. The propene, selectivity shows the similar trends. The maximum propene selectivity goes up to 88%. By the studies of NH3-TPD, H-2-TPR and UV-vis, the role of HY zeolite in the 10W/Al2O3-xHY is explained in two following aspects: (i) changing the Bronsted acidity of catalysts, which may affect the formation of initial carbene species; (ii) modifying the interaction between W species and support for the formation of active centers with intermediate oxidation number (W4+, W5+, W((6-y))(+) (0 < y < 1)). Based on this information, the optimal HY content for 10W/Al2O3-xHY catalysts is about 50-70%. (C) 2004 Elsevier B.V. All rights reserved.
关键词[WOS]: ISOMERIZATION ;  REDUCTION ;  WO3/AL2O3 ;  WO3/SIO2 ;  ALUMINA
语种: 英语
WOS记录号: WOS:000226532000008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139888
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 Sch, Dalian 116023, Peoples R China

Recommended Citation:
Huang, SJ,Liu, SL,Xin, WJ,et al. Metathesis of ethene and 2-butene to propene on W/Al2O3-HY catalysts with different HY contents[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2005,226(1):61-68.
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