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题名: NMR study on the acidity of TS-1 zeolite
作者: Zhuang, JQ;  Yan, ZM;  Liu, XM;  Liu, XC;  Han, XW;  Bao, XH;  Mueller, U
关键词: TS-1 zeolite ;  solid-state MAS NMR ;  acidity
刊名: CATALYSIS LETTERS
发表日期: 2002-10-01
卷: 83, 期:1-2, 页:87-91
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: The acidic properties of TS-1 and Silicalite-I zeolites have been investigated by the solid-state MAS NMR technique capable of in situ sample pretreatment. As shown by a combination of the P-31 MAS NMR and H-1 MAS NMR techniques with trimethylphosphine, not only Bronsted acid sites but also Lewis acid sites exist in the TS-1 zeolites. Moreover, TS-1 zeolite is more acidic compared with Silicalite-1. The H-1, Si-29 MAS NMR spectra and the resonance related to Bronsted acid species in the P-31 MAS NMR spectra demonstrate clearly that the presence of titanium in the framework results in the formation of a new hydroxy group, titanols, which is more acidic than silanols of Silicalite-1. The P-31 MAS NMR measurements also illustrate convincingly the existence of at least two different Lewis acid species on the TS-1 zeolites. The conversion of propylene oxide into methoxypropanol catalyzed by TS-1 or Silicalite-I zeolite in methanol solution as a test reaction has also been described. With the increase of titanium in zeolite, TS-1 appears to have a higher activity during the reaction of propylene oxide to methoxypropanol.
关键词[WOS]: SOLID-STATE NMR ;  NUCLEAR-MAGNETIC-RESONANCE ;  MAS NMR ;  SURFACE-ACIDITY ;  SILICA-ALUMINAS ;  CAVERN DESIGN ;  PROTON NMR ;  SPECTROSCOPY ;  SITES ;  DEHYDRATION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000178619000016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/84889
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.BASF AG, Chem Res & Engn, Zeolite Catalysis, D-67056 Ludwigshafen, Germany

Recommended Citation:
Zhuang, JQ,Yan, ZM,Liu, XM,et al. NMR study on the acidity of TS-1 zeolite[J]. CATALYSIS LETTERS,2002,83(1-2):87-91.
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