Simultaneous catalytic removal of NO and chlorobenzene over Sn–Mn–Ce–Co–O_x 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 ℃, 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–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, C₂HCl_3, and C₂Cl₄ intermediate products were generated in the catalytic reaction, covering the catalytic site. Graphical abstract: [Figure not available: see fulltext.].