Alkali-treatment technique - New method for modification of structural and acid-catalytic properties of ZSM-5 zeolites

被引：443

作者：

Ogura, M ^{[1
]}

Shinomiya, SY ^{[1
]}

Tateno, J ^{[1
]}

Nara, Y ^{[1
]}

Nomura, M ^{[1
]}

Kikuchi, E ^{[1
]}

Matsukata, M ^{[1
]}

机构：

[1] Waseda Univ, Dept Appl Chem, Shinjuku Ku, Tokyo 1698555, Japan

来源：

APPLIED CATALYSIS A-GENERAL | 2001年 / 219卷 / 1-2期

关键词：

alkali-treatment; ZSM-5; mesopore; acidity;

D O I：

10.1016/S0926-860X(01)00645-7

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：

ZSM-5 zeolite having a SiO2/Al2O3 molar ratio of 39.4 was treated in a NaOH alkali solution and the changes in structural and acidic properties were investigated. A siliceous species was selectively dissolved from the framework of zeolite, although a lower amount of Al was also eluted. In this procedure, mesopores with a uniform size were formed on the zeolite, while the microporous structure remained. The acidic property was changed very little quantitatively or qualitatively, even though the catalytic activity for cracking of cumene was enhanced by the alkali-treatment. This can be explained by the facts that adsorptive and diffusive properties of cumene through micropores of the ZSM-5 are increased by the creation of mesopores. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：33 / 43

页数：11