Solid acid catalysts based on supported tungsten oxides

被引：206

作者：

Barton, DG

Soled, SL

Iglesia, E ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA

[2] Exxon Res & Engn Co, Corp Res Lab, Annandale, NJ 08801 USA

来源：

TOPICS IN CATALYSIS | 1998年 / 6卷 / 1-4期

关键词：

tungsten oxides; solid acids; acid-catalyzed reactions;

D O I：

10.1023/A:1019126708945

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Supported WOx clusters are active and stable catalysts for isomerization, dehydration, and cracking reactions. Bronsted acid sites form on WOx clusters when a lower valent element replaces W6+ or when W6+ centers reduce slightly during catalytic reactions. WOx clusters of intermediate size provide the balance between reducibility and accessibility required to maximize the number of surface H+ species in WOx-ZrO2, zirconium tungstate, and oxygen-modified WC catalysts. H-2 is involved in the generation and maintenance of Bronsted acid sites during catalytic reactions on WOx clusters.

引用

页码：87 / 99

页数：13

共 55 条

[1] ISOMERIZATION OF C-13 LABELED BUTANE OVER FE,MN PROMOTED SULFATED ZRO2 CATALYST [J].