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题名: The role of alumina in the supported Mo/HBeta-Al2O3 catalyst for olefin metathesis: A high-resolution solid-state NMR and electron microscopy study
作者: Li, Xiujie;  Zhang, Weiping;  Liu, Shenglin;  Xu, Longya;  Han, Xiuwen;  Bao, Xinhe
通讯作者: 包信和
关键词: olefin metathesis ;  Mo/HBeta-Al2O3 catalyst ;  solid-state NMR ;  Al-27 MQ MAS NMR ;  hyperpolarized Xe-129 NMR ;  electron microscopy
刊名: JOURNAL OF CATALYSIS
发表日期: 2007-08-15
DOI: 10.1016/j.jcat.2007.05.019
卷: 250, 期:1, 页:55-66
收录类别: SCI
文章类型: Article
部门归属: 5,8
项目归属: 502,804
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: High-resolution solid-state MAS NMR; hyperpolarized Xe-129 NMR, SEM, and TEM; XRD; and N-2 adsorption were used to investigate the role of alumina in the Mo/HBeta-Al2O3 catalyst. XRD and N2 adsorption showed that introduction of alumina into the support may protect the HBeta framework from destruction. Quantitative Si-29 MAS, Al-27 MAS, and MQ MAS NMR spectra demonstrated that clealumination occurs preferentially at specific T-sites in the Mo/HBeta catalyst; however, the framework aluminum in HBeta zeolites remains at the same crystallographic sites after the addition of alumina. Hyperpolarized Xe-129 NMR, HRTEM, and SEM images indicate that Mo species are readily dispersed in alumina rather than in HBeta zeolites. The preferential migration of Mo species into the alumina pores may preserve the integrity of the HBeta zeolite framework and result in the moderate distribution of Mo species and acidity in the composite support. These may be correlated with the high performance of Mo/HBeta-Al2O3 catalysts in the metathesis of ethene and butene-2 to propene. (c) 2007 Elsevier Inc. All rights reserved.
关键词[WOS]: MQ MAS NMR ;  ZEOLITE-BETA ;  XE-129 NMR ;  AL-27 MAS ;  SURFACE ;  MO ;  DEALUMINATION ;  SPECTROSCOPY ;  SITES ;  XENON
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000249104000007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/99243
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

Recommended Citation:
Li, Xiujie,Zhang, Weiping,Liu, Shenglin,et al. The role of alumina in the supported Mo/HBeta-Al2O3 catalyst for olefin metathesis: A high-resolution solid-state NMR and electron microscopy study[J]. JOURNAL OF CATALYSIS,2007,250(1):55-66.
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