Determining an optimum catalyst for liquid-phase dehydration of methanol to dimethyl ether

被引：102

作者：

Khandan, Nahid ^{[1
]}

Kazemeini, Mohammad ^{[1
]}

Aghaziarati, Mahmoud ^{[2
]}

机构：

[1] Sharif Univ Technol, Dept Chem & Petr Engn, Tehran, Iran

[2] Malek Ashtar Univ Technol, Fac Mat, Dept Chem & Chem Engn, Tehran, Iran

来源：

APPLIED CATALYSIS A-GENERAL | 2008年 / 349卷 / 1-2期

关键词：

Dehydration; Methanol; Dimethyl ether; Zeolite; Mordenite;

D O I：

10.1016/j.apcata.2008.07.029

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：

The liquid-phase dehydration of methanol to dimethyl ether was investigated over various materials including synthetic zeolites, namely, ZSM-5, Y, Mordenite, Ferrierite and Beta as well as silica and alumina. The key characters investigated were the Si/Al ratio and cation exchange. The results showed that the Mordenite zeolite exchanged with H+ exhibited the highest activity in dehydration of methanol. After finding the most active catalyst, the Mordenite zeolite was modified with Cu, Zn, Ni, Al, Zr, Mg and Na via wet-impregnation method to further improve its selectivity, and characterized by AAS, XRD, NH3-TPD, NH3-FT-IR and BET Surface area techniques. It was found that these materials affected activity of HM zeolite by changing its acidity. Ultimately, amongst all catalysts studied, Al-modified Mordenite zeolite exhibited optimum activity, selectivity and stability for methanol dehydration to dimethyl ether. Crown Copyright (c) 2008 Published by Elsevier B.V. All rights reserved,

引用

页码：6 / 12

页数：7

共 27 条

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