脉冲电晕法藕合Ca(OH)_2固体吸收处理四氯乙烯废气研究  

Removal of perchloroethylene by a pulse corona reactor combined with Ca(OH)2absorption

作　　者：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,杭州310014

出　　处：《环境科学学报》2016年第1期301-306,共6页Acta Scientiae Circumstantiae

基　　金：浙江省自然科学基金(No.LY14B060004)~~

摘　　要：采用线-筒式脉冲电晕反应器对四氯乙烯去除效果进行了研究.结果表明,四氯乙烯去除率随电压的增大而增大.在氮气中加入氧气,四氯乙烯降解效果低于纯氮气下的降解效果.四氯乙烯在氮气下的主要气相产物为Cl_2和少量的CCl_4.当氧气加入后,四氯乙烯主要降解为CO_2、CO、COCl_2、O_3和C_2Cl_4O.为了去除有害中间产物,在反应器中加入Ca(OH)_2固体吸收剂,这明显提高了有害中间产物的去除,存在水汽及含Ca(OH)_2固体吸收剂时并未检测到COCl_2、O_3和有害中间产物C_2Cl_4O,但水汽不利于四氯乙烯去除.The decomposition of perchloroethylene（PCE） in a wire-in-tube pulsed corona reactor was experimentally investigated. It was shown that the decomposition of PCE increased with the increase of input pulse voltage. The decomposition of PCE decreased in the presence of O2. The main gaseous products of PCE decomposition were Cl_2 and CCl_4 in N_2 gas. When O_2 was added into sample gas, the final decomposition products were CO_2, CO,COCl_2, O_3 and C_2Cl4O. In order to avoid the production of unwanted poisonous byproducts from PCE decomposition, the co-existence of sorbent Ca（OH）_2in the reactor was applied. It was found that the unwanted poisonous byproducts from PCE decomposition in gas mixture of _20% O_2 and 80% N_2 were not detected by FT-IR. The decomposition of PCE decreased with the presence of water vapor in gas stream.

关 键 词：四氯乙烯 脉冲电晕 吸收剂 降解 线-筒式反应器 

分 类 号：X701.7[环境科学与工程—环境工程]