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 Hongyang Zhao;Hui Wang;Zhenping Qu

作者机构：Key Laboratory of Industrial Ecology and Environmental EngineeringSchool of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2022年第34卷第2期

页      面：231-243页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

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)。 

主　　题：Catalytic oxidation Cobalt Manganese Cordierite Monolithic catalyst 

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.