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题名: A high-resolution MAS NMR study on the potential catalysts Mo/HBeta for olefin metathesis: The interaction of Mo species with HBeta zeolite
作者: Li, XJ;  Zhang, WP;  Liu, SL;  Han, XW;  Xu, LY;  Bao, XH
通讯作者: 包信和
关键词: MAS NMR ;  Mo/HBeta catalyst ;  HBeta zeolite ;  interaction ;  olefin metathesis reaction ;  ethylene ;  2-butylene ;  propylene
刊名: JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
发表日期: 2006-05-02
DOI: 10.1016/j.molcata.2006.01.046
卷: 250, 期:1-2, 页:94-99
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
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The interfacial interaction of Mo species with the HBeta zeolite was studied by multinuclear MAS NMR, XRD and N-2 adsorption. As proved by the quantitative Al-27 MAS NMR, this interaction is so strong as to dealuminate the framework of HBeta, and leads to a new peak appearing at -14 ppm, which indicates the formation of crystalline Al-2(MoO4)(3). This can also be detected by XRD measurements when the Mo loading is as high as 9.0 wt.%. The corresponding quantitative Si-29 and H-1 MAS NMR spectra show that the amount of silanols and Bronsted acidic sites decrease obviously with increasing Mo loading. This also reveals an interaction between Mo species and HBeta support through an oxygen bridge resulting from condensation with the hydroxyls on the support. At higher Mo loadings, the interaction is so strong that it results in an extraction of aluminum from the zeolite framework, and subsequently appearance of Al-2(MoO4)(3) and loss of Bronsted acidic sites. These can be correlated to the low catalytic activity of Mo/HBeta in metathesis of ethylene and 2-butylene to propylene. (c) 2006 Elsevier B.V. All rights reserved.
关键词[WOS]: HYDROXYL-GROUPS ;  H-BETA ;  HZSM-5 ;  AROMATIZATION ;  MO/HZSM-5 ;  ABSENCE ;  OXYGEN ;  SITES ;  AL-27 ;  SI-29
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000237318000018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/98063
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, XJ,Zhang, WP,Liu, SL,et al. A high-resolution MAS NMR study on the potential catalysts Mo/HBeta for olefin metathesis: The interaction of Mo species with HBeta zeolite[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2006,250(1-2):94-99.
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