脉冲电晕结合催化剂降解二氯甲烷研究  

Removal of dichloromethane by a wire-in-tube pulsed corona reactor combined with catalyst

作　　者：李国平[1] 徐立红 黄桂凤[1] 吕云飞[1] 黄立维[1] 

机构地区：[1]浙江工业大学生物与环境工程学院,浙江杭州310014 [2]绍兴市环境监测中心站,浙江绍兴312000

出　　处：《浙江工业大学学报》2014年第5期528-532,共5页Journal of Zhejiang University of Technology

基　　金：浙江省自然科学基金资助项目(LY14B060004)

摘　　要：采用线-筒式脉冲电晕反应器对二氯甲烷去除效果进行了实验研究.结果表明:二氯甲烷去除率随输入电压的增大而增大.在氮气中加入2%氧气,可以提高二氯甲烷的去除效果.继续提高氧气浓度,二氯甲烷降解率显著下降.二氯甲烷在氮气氛围中降解的主要气相产物为HCl.当加入氧气后,二氯甲烷主要降解为CO2,CO和H2O,同时也产生O3和COCl2等产物.在反应器中加入TiO2催化剂有助于提高二氯甲烷的去除率.当TiO2催化剂的煅烧温度为550℃时,TiO2的催化性能最好.The decomposition of dichloromethane （DCM） in a wire-in-tube pulsed corona reactor was experimentally investigated.Experimental results showed that the decomposition of DCM increased with the increase of input voltage.It was found that the decomposition of DCM reached a maximum value with the addition of 2％ O2 into a nitrogen gas,but decreased with the further increase of O2 concentrations in gas stream.The main gaseous products from DCM decomposition in N2 gas was found to be HCl.When the decomposition in the gas with the presence of O2,the main final decomposition products are CO2,CO and H2O,and accompanied with O3 and COCl2.It was found that the decomposition of DCM increased by coating a layer of TiO2 photocatalyst on the surface of grounding electrode,and the preparation of TiO2 photocatalyst by calcination at 550 ℃ was optimal for DCM decomposition reaction.

关 键 词：脉冲电晕 催化降解 二氯甲烷 

分 类 号：X701.7[环境科学与工程—环境工程]