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题名: Comparative investigation of the MTH induction reaction over HZSM-5 and HSAPO-34 catalysts
作者: Zhou, You1, 2;  Qi, Liang1, 2;  Wei, Yingxu1;  Liu, Zhongmin1
关键词: HZSM-5 ;  HSAPO-34 ;  Methanol to hydrocarbons ;  Induction ;  Mechanism
刊名: MOLECULAR CATALYSIS
发表日期: 2017-05-01
DOI: 10.1016/j.mcat.2017.02.018
卷: 433, 页:20-27
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: Methanol to hydrocarbons (MTH) induction reaction was comparatively investigated over HZSM-5 and HSAPO-34 catalysts combined with on line thermogravimetry analysis of catalyst weight increment by intelligent gravimetric analyzer (IGA) studies. The influence of catalyst topology and acidity and reaction temperature on the reaction performance were correlated with the confined organics formation and evolution over the catalysts. For the latter stage of the MTH induction period, methanol conversion over HZSM-5 catalyst was proved a well-defined autocatalysis process, while over HSAPO-34, the increasing rate of methanol conversion was retarded due to accumulation of methyladamantanes. There existed a similar deactivation behaviour for HZSM-5 catalysts with low Si/Al ratios and HSAPO-34 catalysts during the temperature-programmed MTH (TP-MTH) reaction. But the IGA studies showed that the change of the retained species amount was quite different: for TP-MTH reaction over HZSM-5, the amount firstly increased and then decreased to a stable value; while for HSAPO-34, the amount kept increasing until reached a constant value. MTH induction reaction over HZSM-5 catalyst with different Si/Al ratios and HSAPO-34 catalysts with different Si contents were also investigated. All these findings revealed the influence of catalyst topologies on the formation of retained species and then on the catalyst activity during the MTH induction reaction. (C) 2017 Elsevier B.V. All rights reserved.
关键词[WOS]: DEUTERIUM-LABELED FEEDS ;  TO-OLEFINS CONVERSION ;  CARBON-CARBON BOND ;  METHANOL CONVERSION ;  REACTION-MECHANISM ;  ZEOLITE H-ZSM-5 ;  HYDROCARBON-POOL ;  AROMATIC-HYDROCARBONS ;  MOLECULAR-SIEVE ;  ZSM-5 ZEOLITE
语种: 英语
WOS记录号: WOS:000400562600004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/151967
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, IChEM Collaborat Innovat Ctr Chem Energy Mat, Dalian Natl Lab Clean Energy,Natl Engn Lab Methan, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Zhou, You,Qi, Liang,Wei, Yingxu,et al. Comparative investigation of the MTH induction reaction over HZSM-5 and HSAPO-34 catalysts[J]. MOLECULAR CATALYSIS,2017,433:20-27.
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