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–Ox catalyst were the best when the SnO2 content was 8%. In the temperature range from 120 to 330 ℃, the NO conversion was above 90%, and the T50 and T90 of CB decreased to 127 ℃ and 183 ℃. 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–Ox 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. Graphical abstract: [Figure not available: see fulltext.] ; This work is supported by the National Key Research and Development Program of China (2021YFB3500600, 2021YFB3500605), Key R&D Program of Jiangsu Province (BE2018074), Jiangsu International Cooperation Project (BZ2021018), Nanjing Science and Technology Top Experts Gathering Plan, Science and Technology Plan of Suzhou (SGC2020092), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).