[Alumina-supported catalysts for the catalytic purification of lean-burn automobile exhaust]

Tian-le Zhu; Ji-ming Hao; Li-xin Fu; Jian-xin Wang; Jun-hua Li; Zhi-ming Liu; Xiang-yu Cui

[Alumina-supported catalysts for the catalytic purification of lean-burn automobile exhaust]

Huan Jing Ke Xue. 2004 May;25(3):26-9.

[Article in Chinese]

Authors

Tian-le Zhu¹, Ji-ming Hao, Li-xin Fu, Jian-xin Wang, Jun-hua Li, Zhi-ming Liu, Xiang-yu Cui

Affiliation

¹ Department of Environmental Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China. zhutl@buss.edu.cn

PMID: 15327247

Abstract

Catalytic properties of Ag/Al2O3, In/Al2O3, Sn/Al2O3, Co/Al2O3, Pt/Al2O3 and a two-stage catalyst composed of Ag/Al2O3 and Pt/Al2O3 were investigated for the selective reduction of NO by C3H6 or C2H5OH in excess oxygen. The Ag/Al2O3 showed the highest NO reduction activity among the catalysts studied. A substantial amount of CO was formed over alumina-based transient metal oxides. HC and CO oxidations over Pt/Al2O3 occurred in relatively low temperatures, compared with the other catalysts. The sequential use of Ag/Al2O3 and Pt/Al2O3 was effective to broaden the temperature window for the reduction of NO, to improve oxidation of HC and CO and to inhibit the formation of N2O and CH3CHO.

Publication types

English Abstract
Research Support, Non-U.S. Gov't

MeSH terms

Air Pollutants / analysis*
Aluminum Oxide / chemistry*
Catalysis
Oxidation-Reduction
Vehicle Emissions / analysis*
Vehicle Emissions / prevention & control*

Substances

Air Pollutants
Vehicle Emissions
Aluminum Oxide