Abstract
Mn-based catalysts are often used for catalytic reduction of NO and catalytic degradation of chlorobenzene. In this work, the promotion mechanism of SnO2 modification was investigated. The activities of Sn-Mn-Ce-Co-O-x catalyst were the best when the SnO2 content was 8%. In the temperature range from 120 to 330 degrees C, the NO conversion was above 90%, and the T-50 and T-90 of CB decreased to 127 degrees C and 183 degrees C. The structure of the catalyst was characterized, and it was found that the catalytic effects of SnO2 on pollutant degradation performance of Sn-Mn-Ce-Co-O-x catalyst were mainly as follows: (1) leading to the formation of a large number of Mn4+; (2) increasing the amount of chemisorbed oxygen on the catalyst surface; and (3) improving the redox performance of the catalyst. CHCl3, CCl4, C2HCl3, and C2Cl4 intermediate products were generated in the catalytic reaction, covering the catalytic site.