Simultaneous catalytic removal of NO and chlorobenzene over Sn-Mn-Ce-Co-Ox double-way catalyst

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.

Automated summary

This study investigated the promotion mechanism of SnO2 modification on catalyst performance. The results showed that the Sn-Mn-Ce-Co-O-x catalyst exhibited the best activity when the SnO2 content was 8%. The SnO2 modification mainly contributed to the generation of Mn4+, increased chemisorbed oxygen on the catalyst surface, and improved the redox performance. Additionally, various intermediate products were generated in the catalytic reaction, covering the catalytic sites.