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The effect of calcination time on the activity of WO3/Al2O3/HY catalysts for the metathesis reaction between ethene and 2-butene
Huang, Shengjun; Liu, Shenglin; Zhu, Qingjun; Zhu, Xiangxue; Xin, Wenjie; Liu, Huijuan; Feng, Zaochi; Li, Can; Xie, Sujuan; Wang, Qingxia; Xu, Longya; Xu LY(徐龙伢); Xu LY(徐龙伢)
关键词Metathesis Tungsten Oxide Catalysts Gamma-al2o3 Hy Zeolite Uv-vis Uv Raman Surface Tungstate
刊名APPLIED CATALYSIS A-GENERAL
2007-04-30
ISSN0926-860X
DOI10.1016/j.apcata.2007.02.004
323页:94-103
收录类别SCI
文章类型Article
部门归属8,5
项目归属804,503
产权排名1;1
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
关键词[WOS]TUNGSTEN-OXIDE ; W/HZSM-5 CATALYSTS ; RAMAN-SPECTROSCOPY ; OLEFIN METATHESIS ; ALUMINA ; ZEOLITES ; HYDRODESULFURIZATION ; ISOMERIZATION ; TEMPERATURE ; REDUCTION
英文摘要A series of WO3/Al2O3/HY catalysts were prepared by thermal spread method (i.e., calcination of physically mixed WO3, Al2O3 and HY zeolite) for the metathesis reaction between ethene and 2-butene to propene. The transformation of tungsten oxide species was studied by the characterization techniques of XRD, H-2-TPR, UV-Vis, UV Resonance Raman, NH3-TPD and N-2 adsorption-desorption techniques. The thermal spread effect during calcination results in the dispersion of bulk WO3 phase into microcrystallites on gamma-Al2O3 surface, followed by a chemical transformation to the monomeric surface tungstate species via the involvement of Bronsted acid sites of HY zeolite. These monomeric surface tungstate species, identified by a characteristic Raman band at 970 cm(-1), are crucial for the metathesis activity. We suggest such activity related species are tetrahedrally coordinated. Moreover, it is found that there is an optimal calcination time for the formation of these WO42- species and further calcination causes the condensation to the polytungstate clusters, which are less active for the metathesis reaction. The optimized catalyst shows superior catalytic activity of metathesis reaction between ethene and 2-butene to propene at 453 K with 2-butene conversion close to thermodynamic equilibrium value (similar to 64%). (C) 2007 Elsevier B.V. All rights reserved.
语种英语
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WOS记录号WOS:000246754200011
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/98815
专题中国科学院大连化学物理研究所
通讯作者Xu LY(徐龙伢); Xu LY(徐龙伢)
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式
GB/T 7714
Huang, Shengjun,Liu, Shenglin,Zhu, Qingjun,et al. The effect of calcination time on the activity of WO3/Al2O3/HY catalysts for the metathesis reaction between ethene and 2-butene[J]. APPLIED CATALYSIS A-GENERAL,2007,323:94-103.
APA Huang, Shengjun.,Liu, Shenglin.,Zhu, Qingjun.,Zhu, Xiangxue.,Xin, Wenjie.,...&徐龙伢.(2007).The effect of calcination time on the activity of WO3/Al2O3/HY catalysts for the metathesis reaction between ethene and 2-butene.APPLIED CATALYSIS A-GENERAL,323,94-103.
MLA Huang, Shengjun,et al."The effect of calcination time on the activity of WO3/Al2O3/HY catalysts for the metathesis reaction between ethene and 2-butene".APPLIED CATALYSIS A-GENERAL 323(2007):94-103.
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