低温等离子体自光催化技术降解燃油尾气中的苯系物  

BENZENE HYDROCARBON REMOVAL FROM FUEL EXHAUST BY SELF-SUPPORT RAY POLARIZATION OF NON-THERMAL PLASMA

作　　者：竹涛[1] 万艳东[1] 方岩[1] 徐东耀[1] 舒新前[1] 

机构地区：[1]中国矿业大学化学与环境工程学院,北京100083

出　　处：《石油学报（石油加工）》2010年第6期922-927,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家环保部公益性行业科研专项经费项目(201009052-02);中央高校基本科研业务费专项基金(2009QH03);中国矿业大学(北京)青年科研基金;2010年国家大学生创新性实验计划项目(101141309)资助

摘　　要：以自制的纳米TiO2为催化剂,以陶瓷拉西环为载体,作为低温等离子体反应器中的填料;针对油气中的苯类物质,提出自光催化净化技术。通过对苯系污染物初始浓度、气体流量、电场强度、苯降解率、O3产率、CO2选择性等因素的考察,发现自光催化技术可有效提高油气的苯降解率,当电场强度为12 kV/cm时,苯降解率高达99%,能够抑制O3的产生,有利于提高CO2选择性,促使油气净化更为完全。A new method——self-support ray polarization of non-thermal plasma for benzene hydrocarbon removal from fuel exhaust was developed.The catalyst was made of homemade nano-TiO2 and ceramic raschig rings,which was then as the packed materials of non-thermal plasma reactor.The effects of some factors on benzene removal,such as benzene initial concentration,gas flux,electric field strength,removal efficiency,ozone output and CO2 selectivity,were investigated.The results showed that the use of the technology of self-support ray polarization of non-thermal plasma could enhance benzene removal efficiency.The benzene removal efficiency was 99% at electric field strength of 12 kV/cm.At the same time,this technology could made ozone output decreased and a high selectivity of CO2 could be obtained,which was better than the single technology of non-thermal.The final products were mostly CO,CO2 and H2O.

关 键 词：低温等离子体 自光催化 降解率 CO2选择性 

分 类 号：O646[理学—物理化学] TE624[理学—化学]