介质阻挡放电常压分解苯、二甲苯  

The decomposition of benzene and xylene under normal atmospheric pressure by dielectric barrier discharge

作　　者：蒋洁敏[1] 侯健[1] 郑光云[1] 侯惠奇[1] 

机构地区：[1]复旦大学环境科学研究所,上海200433

出　　处：《中国环境科学》2001年第6期531-534,共4页China Environmental Science

基　　金：上海市环境保护科学技术发展基金资助项目(沪环科98-016)

摘　　要：采用介质阻挡放电(DBD)来分解常压下流动态气体中的苯、二甲苯废气.通过改变极间电压、气体浓度、外加气体,研究苯、二甲苯的降解.在7200~8000V极间电压下,浓度为6000mg/m3、流量为1000mL/min的含苯空气,苯的降解率达90%,主要分解产物为CO2、CO和H2O;浓度为700mg/m3、流量为1000mL/min的含二甲苯空气,二甲苯的降解率高达100％,产物也主要为CO、CO2和H2O.研究结果表明该方法处理流动态的气体效果优于处理静态气体,用该方法可以去除大气中的苯和二甲苯.Dielectric barrier discharge(DBD) is utilized to decompose benzene and xylene vapor in mobile gas under normal atmospheric pressure. The decomposition of benzene and xylene is studied by changing the voltage between electrodes, vapor concentration, and surrounding gases. With the voltage between electrodes from 7200 to 8000 volt, in the air containing benzene with concentration of 6000mg/m3 and flowing at rate of 1000mL/min, the decomposition efficiency of benzene has a maximum of 90%; while that of xylene with concentration of 700mg/m3 and of the same air flowing rate, the decomposition efficiency of xylene can reach 100%. Their main products are CO, CO2 and H2O. The results show that better effects are attained when the method disposes mobile gas than static gas; and that benzene and xylene in the air can be removed by this method.

关 键 词：介质阻挡放电 非平衡态等离子体 苯 二甲苯 废气监测 污染物 大气污染 常压分解 

分 类 号：X831[环境科学与工程—环境工程] X131.1