Surface-Passivated Hierarchically Structured ZSM5 Zeolites: High-Performance Shape-Selective Catalysts for para-Xylene Production
文献类型:期刊论文
作者 | Lv, Jian1; Hua, Zile; Zhou, Jian2; Liu, Zhicheng2; Guo, Hangle1; Shi, Jianlin |
刊名 | CHEMCATCHEM
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出版日期 | 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 |
WOS记录号 | WOS:000434071100018 |
出版者 | WILEY-V C H VERLAG GMBH |
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). |
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. |
入库方式: OAI收割
来源:上海硅酸盐研究所
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