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Comparative investigation of the deactivation behaviors over HZSM-5 and HSAPO-34 catalysts during low-temperature methanol conversion
Qi, Liang1,2; Li, Jinzhe1; Wang, Linying1; Wang, Chan1; Xu, Lei1; Liu, Zhongmin1
刊名CATALYSIS SCIENCE & TECHNOLOGY
2017-05-21
DOI10.1039/c7cy00024c
7页:2022-2031
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
关键词[WOS]TO-OLEFIN CONVERSION ; STATE NMR-SPECTROSCOPY ; ZEOLITE H-ZSM-5 ; COKE FORMATION ; REACTION-MECHANISM ; INDUCTION PERIOD ; HYDROCARBONS CONVERSION ; MOLECULAR-SIEVES ; REACTION CENTERS ; CARBENIUM IONS
英文摘要The deactivation mechanism for the methanol conversion reaction at low temperature was comparatively investigated over HZSM-5 and HSAPO-34 catalysts. Two obviously different deactivation phenomena were directly observed: two-staged deactivation behavior over the HZSM-5 catalyst and exponential- type deactivation behavior over the HSAPO-34 catalyst. Since the start of the deactivation, the amount of the retained species over the HZSM-5 catalyst kept unchanged while the amount over the HSAPO-34 catalyst obviously increased. Both types of deactivation behavior presented an intimate relationship with the accumulation of retained species and their changing reactivity. After detailed characterization and analysis, it was interestingly found that the deactivation of the HZSM-5 catalyst originated from the "overloading effect" of methylbenzenes(smaller than pentamethylbenzene) which are intrinsically active during the autocatalysis reaction stage, while the deactivation of the HSAPO-34 catalyst was caused by accumulation of inactive methyladamantanes, and it was further deduced that the deactivation proceeded from "external to internal" for the HSAPO-34 catalyst. Enhancement of the catalyst diffusivity could effectively extend the catalyst lifetime for the HZSM-5 catalyst, but seemed less effective for the HSAPO-34 catalyst.
语种英语
WOS记录号WOS:000401907700007
引用统计
被引频次:1[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/321008/152269
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, iChEM Collaborat Innovat Ctr Chem Energy Mat, Natl Engn Lab Methanol Olefins,Dalian Natl Lab Cl, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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GB/T 7714
Qi, Liang,Li, Jinzhe,Wang, Linying,et al. Comparative investigation of the deactivation behaviors over HZSM-5 and HSAPO-34 catalysts during low-temperature methanol conversion[J]. CATALYSIS SCIENCE & TECHNOLOGY,2017,7:2022-2031.
APA Qi, Liang,Li, Jinzhe,Wang, Linying,Wang, Chan,Xu, Lei,&Liu, Zhongmin.(2017).Comparative investigation of the deactivation behaviors over HZSM-5 and HSAPO-34 catalysts during low-temperature methanol conversion.CATALYSIS SCIENCE & TECHNOLOGY,7,2022-2031.
MLA Qi, Liang,et al."Comparative investigation of the deactivation behaviors over HZSM-5 and HSAPO-34 catalysts during low-temperature methanol conversion".CATALYSIS SCIENCE & TECHNOLOGY 7(2017):2022-2031.
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