摘要
以挥发性有机污染物(volatile organic compounds,VOCs)代表物质甲苯为去除对象,采用低温等离子体-催化联合技术对其降解开展研究.比较了3种催化剂(TiO2、BaTiO3、TiO2+BaTiO3)等离子体反应器及无催化剂(空管)反应器对甲苯降解性能的异同;考察了BaTiO3和TiO2不同质量比下混合催化剂对甲苯的降解效果,确定了2种材料的最佳配比;对比了不同等离子体反应器的能耗;对生成的反应产物进行了测定分析.结果表明:有催化剂反应器对甲苯的降解性能均优于无催化剂反应器;不同类型催化剂反应器对甲苯的降解性能高低依次为:TiO2+BaTiO3—BaTiO3—TiO2;BaTiO3和TiO2质量比为2.375∶1的等离子体反应器对甲苯的去除效果最好,降解率最高达75.2%,且能耗相比其他催化剂最低,20 kV时功率为138.8 W.
Non-thermal plasma coupled with catalysis was employed to remove the toluene that was a representative pollutant of volatile organic compounds （VOCs）. The effect of plasma reactors with or without fillings on toluene removal was investigated. Three kinds of catalysts were as follows： the catalyst of separate load TiO2 , BaTiO3 , or the mixed catalyst TiO2 ＋ BaTiO3. The effect of plasma reactors by adding the mixed catalyst of different BaTiO3 and TiO2 mass ratios were investigated, while the optimal ratio of the two materials was explored; the energy consumption of the plasma reactors by adding various catalysts were also studied; and the reaction product was analyzed. Results showed that the toluene degradation ability of different catalyst reactors was as follows： the mixed catalyst of TiO2 ＋ BaTiO3- separate load of BaTiO3-separate load of TiO2 ; the plasma reactor by adding mixed catalyst of BaTiO3 and TiO2 mass ratio of 2. 375 ： 1 had the best degradation effect of toluene, and the minimum energy consumption compared to other catalysts. The highest toluene degradation rate was 75.2% and the power was 138.8 W at 20 kV.
出处
《北京工业大学学报》
CAS
CSCD
北大核心
2014年第2期315-320,共6页
Journal of Beijing University of Technology
基金
北京市教育委员会科研计划项目(KM201110005011)
国家863计划资助项目(2011AA03A406)
