Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 12 No. 2 April 2002|
Cu-Mn-Ce/γ-Al2O3 complex oxide
（College of Chemical and Chemistry Engineering,
Central South University, Changsha 410083, China）
Abstract:A new type of catalytic material for purification of automobile exhaust, Cu-Mn-Ce-O/γ-Al2O3, has been studied. The factors affecting its catalytic activity, such as calcination temperature and the period of calcinations and so on have been investigated. Its catalytic activity after SO2-poisoning was deter mined in a fixed-bed reactor by exposing the sample to the atmosphere of 160mL/min SO2/air. The study reveals that the catalyst has shown high catalytic activities for the conversion of NH3 oxidation by NO after sulfate. The conversion of NO reduction over the sulfated catalyst is somewhat higher than that over the fresh catalyst except that the optimum temperature has increased about 100℃. Also at the optimum process for the experiment, the selective catalytic oxidation of CO by NO is over 76% and the conversion of NO reduction is over 80% by NH3.
Key words: purifying material；automobile exhaust; catalytic activity; bimetallic oxide catalyst; resistance to SO2-poisoning