Toluene decomposition performance and NOx by-product formation during a DBD-catalyst process

查看全文 作　　者：Yufang [1,2,3]Guo;Xiaobin [4]Liao;Mingli [5]Fu;Haibao [5]Huang;Daiqi [4]Ye

机构地区：[1]College of Environmental Science and Engineering, Guangzhou University;[2]Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University);[3]Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control;[4]College of Environmental Science and Engineering, South China University of Technology;[5]College of Environmental Science and Engineering, Sun Yat-Sen University

出　　处：《Journal of Environmental Sciences》索引2015年第27卷第2期,共8页

基　　金：funded by the National Natural Science Foundation of China (Nos. 50708021, 51108187);the Research Fund Program of Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University, No. 2013K0007);Guangdong Provincial Key Laboratory of Atmospheric environment and Pollution Control (No. 2011A060901011) 摘　　要：Characteristics of toluene decomposition and formation of nitrogen oxide(NOx) by-products were investigated in a dielectric barrier discharge(DBD) reactor with/without catalyst at room temperature and atmospheric pressure. Four kinds of metal oxides, i.e., manganese oxide(Mn Ox), iron oxide(Fe Ox), cobalt oxide(Co Ox) and copper oxide(Cu O), supported on Al2O3/nickel foam, were used as catalysts. It was found that introducing catalysts could improve toluene removal efficiency, promote decomposition of by-product ozone and enhance CO2 selectivity. In addition, NOx was suppressed with the decrease of specific energy density(SED) and the increase of humidity, gas flow rate and toluene concentration, or catalyst introduction. Among the four kinds of catalysts, the Cu O catalyst showed the best performance in NOx suppression. The Mn Ox catalyst exhibited the lowest concentration of O3 and highest CO2 selectivity but the highest concentration of NOx. A possible pathway for NOx production in DBD was discussed. The contributions of oxygen active species and hydroxyl radicals are dominant in NOx suppression. 关键词：氮氧化物臭氧分解催化剂最佳性能甲苯产物生成电介质阻挡放电最低浓度

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Toluene decomposition performance and NOx by-product formation during a DBD-catalyst process

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