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题名: Relationship between the molybdenum phases and the conversion of n-butane over Mo/HZSM-5
作者: Yuan, SD;  Hamid, SBDA;  Li, YX;  Ying, PL;  Xin, Q;  Derouane, EG;  Li, C
关键词: n-C4H10 Mo/HZSM-5 ;  molybdenum carbide ;  MoO3 ;  aromatization
刊名: JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
发表日期: 2002-03-11
卷: 180, 期:1-2, 页:245-258
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 conversion of n-C4H10 was undertaken on MoO3/HZSM-5 catalyst at 773-973K and the phases of molybdenum species were detected by XRD. The XRD results show that bulk MoO3 on HZSM-5 can be readily reduced by n-C4H10 to MoO2 at 773 K and MoO2 can be gradually carburized to molybdenum carbide above 813 K. The molybdenum carbide formed from the carburization of MoO2 with n-C4H10 below 893 K is alpha-MoC1-x with fcc-structure, while hcp-molybdenum carbide formed above 933 K. During the evolution of MoO3 to MoO2 (>773 K) or the carburization of MoO2 to molybdenum carbide (>813 K), deep oxidation, cracking and coke deposition are serious, in particular at higher reaction temperatures, these lead to the poor selectivity to aromatics. Aromatization of n-C4H10 can proceed catalytically on both Mo2C/HZSM-5 and MoO2/HZSM-5, the distribution of the products for the two catalysts is similar below 813 K, but the, activity for Mo2C/HZSM-5 is much higher than that for MoO2/HZSM-5. (C) 2002 Elsevier Science B.V. All rights reserved.
关键词[WOS]: TRANSITION-METAL CARBIDES ;  MODIFIED ZSM-5 ZEOLITES ;  CATALYTIC PROPERTIES ;  OXIDATIVE DEHYDROGENATION ;  SURFACE-AREA ;  AROMATIZATION ;  ISOMERIZATION ;  NITRIDES ;  PLATINUM ;  METHANE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000174334600025
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/85673
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.Univ Liverpool, Dept Chem, Leverhulme Ctr Innovat Catalysis, Liverpool L69 3BX, Merseyside, England

Recommended Citation:
Yuan, SD,Hamid, SBDA,Li, YX,et al. Relationship between the molybdenum phases and the conversion of n-butane over Mo/HZSM-5[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2002,180(1-2):245-258.
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