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Insight into the deactivation mode of methanol-to-olefins conversion over SAPO-34: Coke, diffusion, and acidic site accessibility

文献类型：期刊论文

作者Xu, Shuliang1; Gao, Shushu1,2; Xu, Shutao1; Wei, Yingxu1; Qiao, Qinglong3; Xu, Zhaochao3; Wu, Xinqiang1,2; Zhang, Mozhi1; He, Yanli1; Liu, Zhongmin1,4
刊名JOURNAL OF CATALYSIS
出版日期2018-11-01
卷号367页码:306-314
关键词Methanol-to-olefins conversion SAPO-34 Coke Intracrystalline diffusion Acidity
ISSN号0021-9517
DOI10.1016/j.jcat.2018.09.010
通讯作者Xu, Shutao(xushutao@dicp.ac.cn) ; Wei, Yingxu(weiyx@dicp.ac.cn) ; Liu, Zhongmin(liuzm@dicp.ac.cn)
英文摘要The whole reaction course of methanol-to-olefins (MTO) conversion over SAPO-34 catalyst with crystal size 7-10 pm has been investigated by multiple spectroscopic techniques. The reaction and deactivation of methanol conversion are closely correlated to the amount, size, and location of coke formed in the CHA nanocages. A nonuniform spatial distribution of these coke species in the individual SAPO-34 crystals is revealed by a combination of hyperpolarized (HP) Xe-129 NMR and confocal fluorescence microscopy (CFM) techniques. Combined with acidic properties and diffusion performance, the bulky coke species formed at the shell layer of the crystals led to an increase of intracrystalline diffusion resistance and a decrease in accessible acidic sites in the deactivated catalyst. The overall catalyst deactivation mode of the MTO reaction is presented in terms of coke formation and location, mass transport variation, and accessibility of Bronsted acid sites in the SAPO-34 catalyst. (C) 2018 Elsevier Inc. All rights reserved.
WOS关键词MAS-PFG NMR ; CRYSTALLIZATION PROCESS ; PARTICLE SPECTROSCOPY ; HYDROCARBON FORMATION ; REACTION-MECHANISM ; SHAPE SELECTIVITY ; REACTION CENTERS ; ZEOLITES ; CATALYST ; CRYSTALS
资助项目National Natural Science Foundation of China[21473182] ; National Natural Science Foundation of China[91545104] ; National Natural Science Foundation of China[91745109] ; National Natural Science Foundation of China[21422606] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2014165] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences[QYZDY-SSW-JSC024] ; DICP[DMTO201603]
WOS研究方向Chemistry ; Engineering
语种英语
WOS记录号WOS:000452578700031
出版者ACADEMIC PRESS INC ELSEVIER SCIENCE
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; DICP ; DICP ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; DICP ; DICP ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; DICP ; DICP ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences ; DICP ; DICP
源URL[http://cas-ir.dicp.ac.cn/handle/321008/166418]  
专题大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者Xu, Shutao; Wei, Yingxu; Liu, Zhongmin
作者单位1.Chinese Acad Sci, Natl Engn Lab Methanol Olefins, iChEM Collaborat Innovat Ctr Chem Energy Mat, Dalian Natl Lab Clean Energy,Dalian Inst Chem Phy, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Key Lab Separat Sci Analyt Chem, Dalian 116023, Peoples R China
4.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Shuliang,Gao, Shushu,Xu, Shutao,et al. Insight into the deactivation mode of methanol-to-olefins conversion over SAPO-34: Coke, diffusion, and acidic site accessibility[J]. JOURNAL OF CATALYSIS,2018,367:306-314.
APA Xu, Shuliang.,Gao, Shushu.,Xu, Shutao.,Wei, Yingxu.,Qiao, Qinglong.,...&Liu, Zhongmin.(2018).Insight into the deactivation mode of methanol-to-olefins conversion over SAPO-34: Coke, diffusion, and acidic site accessibility.JOURNAL OF CATALYSIS,367,306-314.
MLA Xu, Shuliang,et al."Insight into the deactivation mode of methanol-to-olefins conversion over SAPO-34: Coke, diffusion, and acidic site accessibility".JOURNAL OF CATALYSIS 367(2018):306-314.

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