NOx storage and reduction catalysts for automotive lean-burn engines:: effect of parameters and storage materials on NOx conversion

被引：36

作者：

Han, PH

Lee, YK

Han, SM

Rhee, HK ^{[1
]}

机构：

[1] Seoul Natl Univ, Sch Chem Engn, Seoul 151742, South Korea

[2] Seoul Natl Univ, Inst Chem Proc, Seoul 151742, South Korea

来源：

TOPICS IN CATALYSIS | 2001年 / 16卷 / 1-4期

关键词：

NOx storage; periodic operations; stoichiometry number; sorbent material; lean-burn engine;

D O I：

10.1023/A:1016659620699

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The effect of various parameters on the NOx conversion over NOx storage and reduction catalysts supported on alumina was investigated. The Pt/BaO/Al2O3 catalyst exhibited a higher NOx reduction activity than the Pt/Al2O3 catalyst under the static and cycling conditions. The activity of Pt/BaO/Al2O3 catalyst was improved in the cycled feedstream. The Pt/SrO/Al2O3 was found to have as high activity as Pt/BaO/Al2O3 for NOx reduction. In order to achieve effective reduction of NOx, NOx storage in the form of Me(NO3)(2) (Me = Ba or Sr) is more favorable than other nitrates and the rich condition should be chosen in such a way that the sorption capacity can be fully regenerated at a fast rate and the inhibition effect by strongly adsorbed molecules derived from C3H6 and CO can be minimized.

引用

页码：165 / 170

页数：6

共 14 条

[1] The effect of sulphur on the reduction of NO by C3H6 and C3H8 over Pt/Al2O3 under lean-burn conditions [J].