Recent lean NOx catalyst technologies for automobile exhaust control

被引：35

作者：

Akama, H ^{[1
]}

Matsushita, K ^{[1
]}

机构：

[1] Nissan Motor Co Ltd, Nissan Res Ctr, Mat Res Lab, Yokosuka, Kanagawa 2378523, Japan

来源：

CATALYSIS SURVEYS FROM JAPAN | 1999年 / 3卷 / 02期

关键词：

lean NOx; catalyst; zeolite; platinum catalyst; HC adsorption; HC reforming;

D O I：

10.1023/A:1019027803221

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 current status of our development work on lean NOx catalysts for application to future gasoline and diesel engines is described. As a result of further improvements in fuel economy, the temperature of exhaust gas will be lower and there will be smaller quantities of hydrocarbons (HCs) in the exhaust of future engines. Therefore, it is necessary to improve the activity of lean NOx catalysts at lower temperatures and achieve higher selectivity of the NOx-HC reaction. Utilizing precious metal catalysts is one effective way of improving catalyst activity at lower temperatures, and HC adsorption and reforming are two key technologies for improving the catalyst selectivity for the NOx-HC reaction.

引用

页码：139 / 146

页数：8