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题名: Structure and acidity of Mo/ZSM-5 synthesized by solid state reaction for methane dehydrogenation and aromatization
作者: Li, B;  Li, SJ;  Li, N;  Chen, HY;  Zhang, WJ;  Bao, XH;  Lin, BX
通讯作者: Lin BX
关键词: solid-state reaction ;  Mo/ZSM-5 ;  the [Mo5O12](6+) unit ;  methane dehydrogenation and aromatization ;  distribution of Mo species in zeolite ZSM-5
刊名: MICROPOROUS AND MESOPOROUS MATERIALS
发表日期: 2006-01-21
DOI: 10.1016/j.micromeso.2005.09.016
卷: 88, 期:1-3, 页:244-253
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 502
产权排名: 3;4
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: The Mo/ZSM-5 catalysts were synthesized by solid-state reaction with the mixture of MoO3 and HZSM-5 under N-2 atmosphere at 500 degrees C, and characterized by XRD, MAS NMR, BET, NH3-TPD, FT-IR and powder XRD structural analysis. The results showed that the Mo species were well dispersed on the internal and external surface of the zeolite ZSM-5, while the framework of ZSM-5 was retained. One part of Mo species inside the channels of ZSM-5 can be described as [Mo5O12](6+) units in the Mo/ZSM-5 with 8 wt% MoO3 loading. The [Mo5O12](6+) units are situated at the cross-point of the zigzag channel and the straight channel. They interacted with the framework of ZSM-5, and decreased the Bronsted acid sites remarkably. There was about 0.47 [Mo5O12](6+) unit in every cell of the ZSM-5 on an average. The other part of Mo species is distributed on the external surface of the ZSM-5 crystals, and can be described as crystallites of molybdenum oxides. The distribution of Mo species on HZSM-5 increased the Lewis acid sites in the catalysts. The [Mo5OxCy]"(+) units inside the channels of ZSM-5 partially reduced by methane maintained the catalytic activity of the catalysts and were beneficial for the formation of benzene during methane dehydrogenation and aromatization at 700 degrees C. (c) 2005 Elsevier Inc. All rights reserved.
关键词[WOS]: TEMPERATURE-PROGRAMMED DESORPTION ;  DEHYDRO-AROMATIZATION ;  HZSM-5 ZEOLITE ;  SUPPORTED MOLYBDENUM ;  MO/HZSM-5 CATALYSTS ;  ZSM-5 ZEOLITES ;  NONOXIDATIVE CONDITIONS ;  BIFUNCTIONAL CATALYSIS ;  HYDROTHERMAL TREATMENT ;  ACTIVE-SITES
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000234774100032
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/98065
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.Peking Univ, Coll Chem & Mol Engn, Inst Phys Chem, Beijing 100871, Haidian Dist, Peoples R China
2.Guangxi Univ, Coll Chem & Chem Engn, Nanning 530004, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Li, B,Li, SJ,Li, N,et al. Structure and acidity of Mo/ZSM-5 synthesized by solid state reaction for methane dehydrogenation and aromatization[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2006,88(1-3):244-253.
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