The role of alumina in the supported Mo/HBeta-Al2O3 catalyst for olefin metathesis: A high-resolution solid-state NMR and electron microscopy study

	The role of alumina in the supported Mo/HBeta-Al2O3 catalyst for olefin metathesis: A high-resolution solid-state NMR and electron microscopy study
	Li, Xiujie; Zhang, Weiping; Liu, Shenglin; Xu, Longya; Han, Xiuwen; Bao, Xinhe
刊名	journal of catalysis
	2007-08-15
卷号	250 期号:1 页码:55-66
关键词	olefin metathesis Mo/HBeta-Al2O3 catalyst solid-state NMR Al-27 MQ MAS NMR hyperpolarized Xe-129 NMR electron microscopy
通讯作者	包信和
产权排序	1;1
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.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	chemistry, physical ; engineering, chemical
研究领域[WOS]	chemistry ; engineering
关键词[WOS]	mq mas nmr ; zeolite-beta ; xe-129 nmr ; al-27 mas ; surface ; mo ; dealumination ; spectroscopy ; sites ; xenon
收录类别	SCI
原文出处	true
语种	英语
WOS记录号	WOS:000249104000007
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/99243]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
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	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.
APA	Li, Xiujie,Zhang, Weiping,Liu, Shenglin,Xu, Longya,Han, Xiuwen,&Bao, Xinhe.(2007).The role of alumina in the supported Mo/HBeta-Al2O3 catalyst for olefin metathesis: A high-resolution solid-state NMR and electron microscopy study.journal of catalysis,250(1),55-66.
MLA	Li, Xiujie,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".journal of catalysis 250.1(2007):55-66.