Experimental study of the formation and the reaction of an intermediate during the lean NOx reaction over Cu-ZSM-5

被引：29

作者：

Guyon, M

LeChanu, V

Gilot, P

Kessler, H

Prado, G

机构：

[1] UNIV HAUTE ALSACE,ECOLE NATL SUPER CHIM MULHOUSE,LAB GEST RISQUES & ENVIRONM,CNRS EP082,F-68200 MULHOUSE,FRANCE

[2] ECOLE NATL SUPER CHIM,LAB MAT MINERAUX,URA CNRS 3,F-68093 MULHOUSE,FRANCE

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 1996年 / 8卷 / 02期

关键词：

Cu-ZSM-5; intermediate; nitric oxide reduction; mechanism; exhaust post-treatment;

D O I：

10.1016/0926-3373(95)00069-0

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：

Two-step experiments were conducted to investigate the mechanism of NOx reduction over copper ion-exchanged ZSM-5 zeolites. The first step was the formation of a reactive intermediate and the second one the reaction of this intermediate during a transient regime without any hydrocarbon injection. The presence of NO or NO2 appears to be mandatory to obtain such an intermediate. In contrast, the presence of oxygen is not necessary, The intermediate reacts only with NO2 as well as with O-2. The role of oxygen could be to oxidize NO to NO2 in a first reaction step.

引用

页码：183 / 196

页数：14

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