Promoted metal utilization capacity of alkali-treated zeolite: Preparation of Zn/ZSM-5 and its application in 1-hexene aromatization

被引：118

作者：

Li, Yuning ^{[1
,2
]}

Liu, Shenglin ^{[1
]}

Xie, Sujuan ^{[1
]}

Xu, Longya ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

APPLIED CATALYSIS A-GENERAL | 2009年 / 360卷 / 01期

关键词：

ZSM-5; zeolite; Alkali treatment; Zn; 1-Hexene; Aromatization; ZSM-5; ZEOLITES; CATALYTIC PERFORMANCE; MFI ZEOLITES; ACID SITES; PROPANE; DESILICATION; ALKANES; HZSM-5; MESOPOROSITY; HYDROCARBONS;

D O I：

10.1016/j.apcata.2009.02.039

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Promoted metal utilization capacity of ZSM-5 zeolite has been achieved via the intracrystalline mesopores created by alkali treatment. The untreated and alkali-treated Zn/ZSM-5 catalysts were prepared by the conventional liquid ion exchange and impregnation methods. These catalysts were investigated by several techniques: N-2 adsorption-desorption, transmission electron microscopy, X-ray photoelectron spectroscopy, ammonia temperature-programmed desorption, and Fourier transform infrared spectroscopy. Compared with the untreated catalysts, the alkali-treated catalysts exhibited higher Zn-loading in liquid ion exchange, better metal distribution and more Lewis acid sites in impregnation, owing to the location of Zn species in the created intracrystalline mesopores. The alkali-treated Zn/ZSM-5 catalysts displayed dramatically improved catalytic stability in 1-hexene aromatization. These findings show new potential for developing some advanced bifunctional metal-zeolite catalysts by a facile and low-cost method. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：8 / 16

页数：9

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