The effect of pretreatments on different copper exchanged ZSM-5 for the decomposition of NO

被引：11

作者：

Curtin, T

Grange, P

Delmon, B

机构：

[1] Catalys./Chim. des Materiaux Divises, U.C.L., 1348 Louvain-la-Neuve

来源：

CATALYSIS TODAY | 1997年 / 36卷 / 01期

关键词：

copper; ZSM-5; nitric oxide decomposition;

D O I：

10.1016/S0920-5861(96)00196-4

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Copper exchanged zeolites are proving to be very important in decomposing NO into its elements. This work compares the activities of under and over exchanged copper ZSM-5 catalysts and their properties when treated in reducing atmospheres. The copper in the under exchanged samples was shown to be relatively stable to reduction in reducing atmospheres. However, the copper in over exchanged Cu-ZSM-5 was easily reduced and seemed to migrate forming aggregates on the surface detectable by XPS. This aggregate formation was shown to be reversible. A proposal on the state of copper within the zeolite is presented.

引用

页码：57 / 64

页数：8

共 14 条

[1]

CENTI G, 1994, ACS SYM SER, V552, P22

[2] THE INTERACTION OF NO WITH COPPER IONS IN ZSM5 - AN EPR AND IR INVESTIGATION [J].