Synergistic effects in Mn-Co mixed oxide supported on cordierite honeycomb for catalytic deep oxidation of VOCs  

作　　者：Hongyang Zhao Hui Wang Zhenping Qu 

机构地区：[1]Key Laboratory of Industrial Ecology and Environmental Engineering,School of Environmental Science and Technology,Dalian University of Technology,Dalian 116024,China

出　　处：《Journal of Environmental Sciences》2022年第2期231-243,共13页环境科学学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.21876019 and 21806017);Fundamental Research Funds for the Central Universities(No.DUT19LAB10);Dalian Science and Technology Innovation Fund(No.2019J12SN74);National Key Research and Development Program of China(No.2019YFC1903903)。

摘　　要：A series of Co-Mn mixed oxide catalyst supported on a cordierite monolith was facilely synthesized by ultrasonic impregnation.Its catalytic performance was evaluated in the combustion of toluene,ethyl acetate and its mixture.It was observed that with incorporating Mn into Co_(3)O_(4),the formation of solid solution with spinel structure could significantly improve the catalytic activity of pure phase Co_(3)O_(4).And the monolithic Co_(0.67)Mn_(0.33)O_(x) catalyst showed the best catalytic performance in the catalytic oxidation of toluene and ethyl acetate which could be completely oxidized at 220 and 180℃ respectively under the reaction velocity(WHSV)about 45,000 m L/(g·hr)and pollutant concentration of 500 ppm V.The total conversion temperature of the VOCs mixture was at 230℃(500 ppm V toluene and 500 ppm V ethyl acetate)and determined by the temperature at which the most difficult molecule was oxidized.The excellent catalytic performance of monolithic Co_(0.67)Mn_(0.33)O_(x) was attributed to the higher content of Mn^(3+),Co^(3+),surface adsorbed oxygen and better redox ability.The prepared catalyst showed the good mechanical stability,reaction stability,and good adaptability to different reaction conditions.

关 键 词：Catalytic oxidation COBALT MANGANESE CORDIERITE Monolithic catalyst 

分 类 号：X701[环境科学与工程—环境工程] TQ426[化学工程]