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	Insight into the deactivation mode of methanol-to-olefins conversion over sapo-34: coke, diffusion, and acidic site accessibility
	Gao, Shushu1,2; Xu, Shutao1; Wei, Yingxu1; Qiao, Qinglong3; Xu, Zhaochao3; Wu, Xinqiang1,2; Zhang, Mozhi1; He, Yanli1; Xu, Shuliang1; Liu, Zhongmin1,4
刊名	Journal of catalysis
	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
DOI	10.1016/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
WOS研究方向	Chemistry ; Engineering
WOS类目	Chemistry, Physical ; Engineering, Chemical
语种	英语
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
WOS记录号	WOS:000452578700031
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2372970
专题	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	Gao, Shushu,Xu, Shutao,Wei, Yingxu,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	Gao, Shushu.,Xu, Shutao.,Wei, Yingxu.,Qiao, Qinglong.,Xu, Zhaochao.,...&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	Gao, Shushu,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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