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Structure and acidity of Mo/ZSM-5 synthesized by solid state reaction for methane dehydrogenation and aromatization
Li, B; Li, SJ; Li, N; Chen, HY; Zhang, WJ; Bao, XH; Lin, BX; Lin BX; 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
2006-01-21
DOI10.1016/j.micromeso.2005.09.016
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
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
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.
语种英语
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WOS记录号WOS:000234774100032
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被引频次:79[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/98065
专题中国科学院大连化学物理研究所
通讯作者Lin BX; Lin BX
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
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GB/T 7714
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.
APA Li, B.,Li, SJ.,Li, N.,Chen, HY.,Zhang, WJ.,...&Lin BX.(2006).Structure and acidity of Mo/ZSM-5 synthesized by solid state reaction for methane dehydrogenation and aromatization.MICROPOROUS AND MESOPOROUS MATERIALS,88(1-3),244-253.
MLA Li, B,et al."Structure and acidity of Mo/ZSM-5 synthesized by solid state reaction for methane dehydrogenation and aromatization".MICROPOROUS AND MESOPOROUS MATERIALS 88.1-3(2006):244-253.
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