气体循环条件下等离子体催化氧化吸附态的苯和甲苯  

Plasma catalytic oxidation of absorbed benzene and toluene under gas circulation

作　　者：秦彩虹[1] 党小庆[1] 黄家玉[2] 滕晶晶[1] 康忠利 黄学敏[1] QIN Caihong DANG Xiaoqing HUANG Jiayu TENG Jingjing KANG Zhongli HUANG Xuemin(Key Laboratory of Environmental Engineering in Shaanxi, School of Environment ＆ Municipal Engineering, Xi＇an University of Architecture ＆ Technology, Xi＇an 710055, China Air Pollution Control Technology Research Center, Chinese Research Aeademy of Environmental Sciences, Beijing 100012, China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西省环境工程重点实验室,西安710055 [2]中国环境科学研究院大气污染控制技术研究中心,北京100012

出　　处：《环境工程学报》2017年第3期1691-1697,共7页Chinese Journal of Environmental Engineering

基　　金：陕西省科技统筹创新工程计划项目(2016KTZDSF-02-02)

摘　　要：在气体循环条件下以MnO_x-AgO_x/γ-Al_2O_3为吸附剂兼催化剂研究了低温等离子体催化氧化吸附态的苯和甲苯,并对催化剂进行了BET和XRD表征。结果表明:气体循环条件下等离子体催化氧化技术同样适用于吸附态的双组分苯与甲苯的降解并且C0_x产率和C0_2选择性不比降解单组分苯或甲苯时的低。气体循环放电90 min后,与γ-Al_2O_3相比,引入Mn0_x-AgO_x/γ-A1_2O_3、COO_x-CeO_x/γ-Al_2O_3后,CO_x产率分别提高了9%、12%;C0_2选择性也得到了提高并都接近100%;臭氧浓度分别减少了51%、39%;N_20浓度相应也降低了26%和38%。最后结合实验结果讨论了引入催化剂后反应机理的变化。Plasma oxidation of adsorbed benzene and toluene was investigated under gas circulation with AgOx/γ-Al2O3 and CoOx-CeOx/γ-Al2O3 as the adsorbent and/or catalyst.The catalysts were characterized by Brunauer-Emmett-Teller（BET） and X-ray diffraction（XRD） analyses.The results show that plasma-driven catalytic technology with gas circulation is suitable for two-component VOCs removal without decreasing the COx yield and CO2 selectivity of either component.After circulating the discharge gas for 90 min,the introduction of MnOxAgOx/γ-Al2O3 and CoOx-CeOx/γ-Al2O3 improves the COx yield by 9% and 12%,respectively,compared to γ-Al2O3 and enhances the CO2 selectivity to almost 100%.Moreover,the O3 concentration is reduced by 51%and39%and the N2O concentration by 26% and 38% when using MnOx-AgOX/γ-Al2O3 and CoOx-CeOx/γ-Al2O3,respectively,instead of γ-Al2O3.Finally,the change of the mechanism induced by the catalysts is discussed.

关 键 词：低温等离子体 苯和甲苯 氧化 气体循环 

分 类 号：X701[环境科学与工程—环境工程]