摘要
采用介质阻挡放电低温等离子体技术处理苯、乙酸乙酯和二氯甲烷,考察了反应器的结构、输出电压、初始浓度以及气速等条件对降解率和能量效率的影响。结果表明:3种VOC中,二氯甲烷最易被降解,乙酸乙酯次之,而苯的降解率最低;双介质阻挡放电反应器对VOC的处理效果优于单介质,在输出电压为15 kV的条件下,采用双介质反应器对VOC的降解率可达99%;输出电压越高,挥发性有机废气的降解率越高,在输出电压从15 kV(P=73.7 W)降低到10 kV(P=21 W),VOC的降解率从99%降低到6.6%;VOC浓度越高降解率越低,在VOC初始浓度从244 mg·m^(-3)升高到2 542 mg·m^(-3)时,降解率从96.9%降低到63.98%;气速直接关乎停留时间,停留时间延长,降解率提高,气速300 L·h^(-1)下降到100 L·h^(-1),降解率从78%提高到97%。
Effects of reactor structure,output voltage,initial concentration of VOC,and gas velocity on degradation of three typical volatile organic compounds,benzene,ethyl acetate,and dichloromethane,by low temperature plasma technology processing were investigated.Results showed that dichloromethane could be degraded easily,followed by ethyl acetate and benzene.Results also showed that the double medium DBD reactor has a better performance than the single medium DBD reactor in VOC degradation,which can reach 99% when the output voltage is 15 kV.Furthermore,VOC degradation rate was decreased from 99% to 6.6% with the decreasing output voltage from 15 k V（ P = 73.7 W） to 10 kV（ P = 21 W）,decreased from 96.9% to 63.98% with the increasing VOC concentration from 244 mg·m^-3 to 2 542 mg·m^-3,and decreased from 97% to 78% with the increasing gas velocity from 100 L·h^-1 to 300 L·h^-1.
作者
吴萧
刘盛余
何廷宇
康岷慧
王青青
WU Xiao LIU Shengyu HE Tingyu KANG Minhui WANG Qingqing(Air Environmental Modeling and Pollution Controlling Key Laboratory of Sichuan Higher Education Institutes, Chengdu University of information Tech- nology, Chengdu 610225, China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2017年第10期5502-5508,共7页
Chinese Journal of Environmental Engineering
基金
四川省教育厅创新团队项目(14TD0020)
成都市科技局科技惠民技术研发项目(2015-HM01-00127-SF)
成都市科技局国际合作项目(2016-GH02-00032-HZ)
成都信息工程大学青年学术带头人科研基金(J201513)
关键词
低温等离子体
苯
乙酸乙酯
二氯甲烷
介质阻挡放电
low temperature plasma
benzene
ethyl acetate
dichloromethane
dielectric barrier discharge（DBD）
