供电方式对介质阻挡放电-催化降解苯的影响  

Effect of Power Supply Mode on Removal of Benzene by DBD-Catalysis

作　　者：王洪昌[1] 李锻[1] 吴彦[1] 李杰[1] 李国锋[1] 

机构地区：[1]大连理工大学静电与特种电源研究所,大连116024

出　　处：《高电压技术》2009年第11期2759-2763,共5页High Voltage Engineering

基　　金：国家自然科学基金(50678031)~~

摘　　要：为研究能量注入方式对等离子体降解有机污染物的影响,分别将交流高压和双极性脉冲高压引入介质阻挡放电反应器,结合Mn催化剂对苯进行降解,研究供电方式对放电特性、苯去除率和产物选择性的影响。结果发现,与交流电源相比,脉冲电源供电下能量在极短的时间里注入到反应器内,产生瞬间大功率放电和高能活性粒子,可以实现对苯的高效降解和较高的CO2选择性。此外,相同功率下脉冲介质阻挡放电(DBD)的臭氧质量浓度更多,更有利于与Mn催化剂结合对苯进行降解。在电压为18.8kV的条件下,对苯的去除率最高可达98%,CO2转化率可达77%。In order to investigate the effect of the energy injection mode on the decomposition VOCs by non-thermal plasma, a dielectric barrier discharge （DBD） driven by ac power or bipolar pulse power with catalyst Mn was studied. Moreover, the effect of power supply on discharge characteristic, removal rate of benzene and selectivity of byproducts were investigated. The results show that DBD combined with bipolar pulse power could produce instantaneously strong discharge and highly energized particles which lead to high removal rates of benzene and selectivity of CO2. The bipolar pulse DBD with catalyst Mn is favorable for decomposition of benzene due to the high production of ozone. At the applied voltage of 18.8 kV, the highest removal rates of benzene can reach 98% and the selectivity of CO2 is 77%.

关 键 词：低温等离子体 介质阻挡放电 双极性脉冲高压 催化 苯 CO2选择性 

分 类 号：X701.7[环境科学与工程—环境工程]