Surface-Passivated Hierarchically Structured ZSM5 Zeolites: High-Performance Shape-Selective Catalysts for para-Xylene Production

doi:10.1002/cctc.201800044

	Surface-Passivated Hierarchically Structured ZSM5 Zeolites: High-Performance Shape-Selective Catalysts for para-Xylene Production
	Lv, Jian 1; Hua, Zile ; Zhou, Jian 2; Liu, Zhicheng 2; Guo, Hangle 1; Shi, Jianlin
刊名	CHEMCATCHEM
	2018
卷号	10 期号:10 页码:2278
关键词	hierarchically structured zeolites shape selectivity surface passivation xylene ZSM-5
ISSN号	1867-3880
DOI	10.1002/cctc.201800044
英文摘要	Hierarchically structured ZSM-5 zeolites (HSZ) were synthesized and used as high-performance catalysts for para-xylene (p-X) production by tuning their pore structures and external surface acidity, which was achieved by two independent passivation approaches: dealumination in oxalic acid solution and chemical liquid deposition of tetra-ethoxysilane (CLD of TEOS). The mesoporous structures of HSZ were well-preserved after dealumination or CLD of TEOS, and the external surfaces of HSZ were passivated significantly. Compared to dealumination, CLD is more efficient because not only the external surface could be passivated, but also the pore-openings of HSZ had been effectively narrowed, which both favored the enhancement of product p-X selectivity in ortho-xylene (o-X) isomerization. The constraint index (CI) of as-synthesized catalysts derived from the competitive reactions of ethylbenzene (EB) dealkylation and meta-xylene (m-X) isomerization and gravimetric adsorption measurements were introduced to investigate the extent of pore-narrowing by CLD of TEOS. Benefitting from the auxiliary mesopores and surface-passivation treatments, the optimized catalyst HSZ(Si0.5) showed remarkably enhanced catalytic activity over the microporous ZSM-5 counterpart in the model reaction of o-X isomerization.
学科主题	Chemistry, Physical
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000434071100018
资助机构	This work was sponsored by the National Natural Science Foundation of China (21776297, U1510107, 21403303) and National Basic Research Program of China (2013CB933200). ; This work was sponsored by the National Natural Science Foundation of China (21776297, U1510107, 21403303) and National Basic Research Program of China (2013CB933200).
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/24910]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, 1295 Dingxi Rd, Shanghai 200050, Peoples R China 2.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China 3.Sinopec Shanghai Res Inst Petrochem Technol, 1658 Pudong North Rd, Shanghai 201208, Peoples R China
推荐引用方式 GB/T 7714	Lv, Jian,Hua, Zile,Zhou, Jian,et al. Surface-Passivated Hierarchically Structured ZSM5 Zeolites: High-Performance Shape-Selective Catalysts for para-Xylene Production[J]. CHEMCATCHEM,2018,10(10):2278, 2284.
APA	Lv, Jian,Hua, Zile,Zhou, Jian,Liu, Zhicheng,Guo, Hangle,&Shi, Jianlin.(2018).Surface-Passivated Hierarchically Structured ZSM5 Zeolites: High-Performance Shape-Selective Catalysts for para-Xylene Production.CHEMCATCHEM,10(10),2278.
MLA	Lv, Jian,et al."Surface-Passivated Hierarchically Structured ZSM5 Zeolites: High-Performance Shape-Selective Catalysts for para-Xylene Production".CHEMCATCHEM 10.10(2018):2278.