Recent advances in automobile exhaust catalysts

被引:345
作者
Matsumoto, SI [1 ]
机构
[1] Toyota Motor Co Ltd, Mat Engn Div 1, Aichi 4718572, Japan
关键词
oxygen storage capacity; three-way catalyst; NO(x) storage-reduction catalyst; sulfur poisoning; steam reforming; hexagonal cell;
D O I
10.1016/j.cattod.2004.04.048
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Catalysts, which were recently developed by Toyota for the control of automobile exhaust, are reviewed. (1) For use in low emission vehicles, a CeO(2)-ZrO(2) solid solution (CZ) with both high oxygen storage capacity and high heat resistance was developed as a support for a high performance three-way catalyst (TWC). (2) A novel three-way catalyst named the NO(x) storage-reduction catalyst (NSR) was developed for automotive lean-burn engines. The NSR catalyst can store NO(x) in an oxidizing atmosphere and then reduce stored NO(x) at stoichiometric or reducing conditions. Also, it has high tolerance to sulfur poisoning which is the most stringent problem for the NSR catalyst. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:183 / 190
页数:8
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