Effect of alkali modification to ZSM-5 zeolite on the aromatization of methanol

被引：0

作者：

Li J.-H. ^{[1
]}

Xie J.-Y. ^{[2
]}

Zhang D. ^{[1
]}

Liu L. ^{[2
]}

Xing J.-J. ^{[2
]}

机构：

[1] School of Petrochemical Engineering, Liaoning Shihua University, Fushun

[2] School of Chemistry and Chemical Engineering, Bohai University, Jinzhou

来源：

Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2021年 / 49卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Alkali modified; Aromatization of methanol; Mesoporous; ZSM-5; zeolite;

D O I：

10.1016/S1872-5813(21)60016-6

中图分类号：

学科分类号：

摘要：

ZSM-5 zeolites were modified by desilication with sodium acetate and sodium citrate. The physicochemical properties of ZSM-5 zeolites, such as crystal structure, acid content, surface area and pore volume, were characterized by XRD, SEM, NH3-TPD, 27Al MAS NMR, pyridine adsorption infrared spectroscopy and N2 adsorption-desorption isotherms. The results indicate that pore size of the zeolite increases and mesoporous structures are formed by alkali modification, and the amount of Lewis and Brönsted acid contents decreases obviously. When the concentration of sodium acetate solution is 0.5 mol/L, the modified zeolite has a suitable B/L value for the aromatization of methanol while forming a large number of mesoporous structures. Compared with microporous ZSM-5, the catalyst life is increased from 20 h to 74 h, and the highest yield of aromatics is increased from 20.97% to 40.05%. Copyright ©2021 Editorial Dept. of Journal of Fuel Chemistry and Technology. All rights reserved.

引用

页码：338 / 345

页数：7

共 43 条

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