College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China.
Environmental Science Research and Design Institute of Zhejiang Province, Hangzhou, 310007, China.
Chemosphere. 2019 Jul;226:766-773. doi: 10.1016/j.chemosphere.2019.04.005. Epub 2019 Apr 3.
A new reactor of array double dielectric barrier discharge (DDBD) combined with catalysis was prepared, and the effect of different factors on removal efficiency of toluene at pilot scale were investigated. The possible degradation mechanism was explored. The results indicate that the removal efficiency of toluene in the exhaust gas decreases with the increasing of the toluene initial concentration and the gas flow rate, but increases with the increasing of the specific energy density. When the air relative humidity is 55%, the removal efficiency of toluene is higher than that of the relative humidity by 85%. The results of XPS, FT-IR and GC-MS analysis show that the main intermediate products of removing toluene by DDBD combined with TiO/AlO catalyst are phenol, benzaldehyde, benzyl alcohol, benzoic acid, N-benzyl formamide, dimethyl terephthalate, dimethyl isophthalate and other substances. There are five possible pathways to degrade toluene by DDBD combined with TiO/AlO.
一种新型的阵列式双介质阻挡放电（DDBD）与催化相结合的反应器被制备出来，并在中试规模下研究了不同因素对甲苯去除效率的影响。探讨了可能的降解机制。结果表明，随着甲苯初始浓度和气体流速的增加，废气中甲苯的去除效率降低，但随着比能密度的增加而增加。当空气相对湿度为 55%时，甲苯的去除效率高于相对湿度为 85%时的去除效率。XPS、FT-IR 和 GC-MS 分析结果表明，DDBD 与 TiO/AlO 催化剂结合去除甲苯的主要中间产物是苯酚、苯甲醛、苯甲醇、苯甲酸、N-苄基甲酰胺、对苯二甲酸二甲酯、间苯二甲酸二甲酯等物质。通过 DDBD 与 TiO/AlO 结合降解甲苯有五种可能的途径。
