等离子体协同MnO_x/SBA-15催化氧化正己醛影响因素研究  

Study on factors influencing Hexanal oxidation by plasma-assisted MnO_x/SBA-15 catalysis

作　　者：向东[1] 赵国涛[1] 叶代启[1] 

机构地区：[1]华南理工大学环境科学与工程学院,广州510006

出　　处：《中国科技论文在线》2010年第5期355-359,共5页

基　　金：高等学校博士学科点专项科研基金资助项目(20070561042);国家高技术研究发展计划(863计划)资助项目(2006AA06A310);国家自然科学基金资助项目(50978103)

摘　　要：采用浸渍法制备了MnOx/SBA-15催化剂,利用BET和XRD对催化剂进行表征。考察了各影响因素对介质阻挡放电等离子体协同MnOx/SBA-15催化剂对降解正己醛的影响。结果显示,负载MnOx后的SBA-15仍然保持介孔结构;等离子体与催化剂表现出较好的协同作用,干燥气氛下MnOx负载量为10%时降解效果较好,正己醛去除率达99%;相比干燥气氛,相对湿度低于20%可提高正己醛去除率,但高于20%时催化效果下降;正己醛去除率随初始浓度或气体流量的增加而下降。MnOx supported mesoporous molecular sieves SBA-15 were prepared by impregnation method,and characterized by BET and XRD. The factors influencing Plasma-assisted catalysis oxidation of hexanal over MnOx/SBA-15 catalysts was investigated with dielectric barrier discharge （DBD） reactor. Results showed that the mesoporous structure of the SBA-15 was retained after MnOx loading. Good synergetic efficient appeared between the catalyst and plasma,with the highest hexanal removal efficiency of 99% at MnOx loading of 10% and voltage of 7.5 kV. Relative humidity below 20% promoted the oxidation of hexanal. However,higher relative humidity reduced the catalytic property. In addition,removal efficiency declined with increasing initial concentration of hexanal and gas flowrate.

关 键 词：餐饮油烟 VOC 正己醛 介孔分子筛 低温等离子体 

分 类 号：X51[环境科学与工程—环境工程]