阵列电极流光放电处理苯乙烯的研究

Decomposition of Styrene by Streamer Discharge with Array Electrode

针对放电预处理-形成气溶胶-电收集的挥发性有机物(VOCs)处理路线,建立基于阵列电极的流光放电系统,研究伏安特性、臭氧产生和苯乙烯去除,考察放电特性、苯乙烯处理能效、副产物控制和气溶胶的生成情况。结果表明:阵列电极直流放电能产生稳定的流光;臭氧产生量、苯乙烯去除量均和能量密度正相关;正极性比负极性的放电能效高,在放电间距为20mm时,正极性流光的臭氧产生和苯乙烯去除能效分别为0.55mol/(100 e V)和0.45mol/(100 e V);经流光放电处理后,苯乙烯聚合形成油状黄褐色气溶胶;XPS表征结果显示,气溶胶中C-C、C-H功能团的含量约为82.52%,且深度氧化产物-COOR、-COOH功能团很少。

For the evaluation of VOCs control method of pre-treat by discharge to aerosols,and then electrostatic collection,a streamer discharge system with array electrode was built for styrene treatment.The discharge characteristics,energy efficiency of styrene decomposition,by-product control,and aerosols produced were studied by voltage-current curve,ozone produced,and styrene removal.The results show that,based on the array electrode,stable streamer is generated by DC discharge.It is found that a positive correlation between ozone production,as well as styrene decomposition and special input energy.For positive discharge,the energy efficiency is higher than that of negative discharge.For the positive streamer with pine-plate distance of 20mm,the energy efficiency of ozone production and styrene decomposition is about 0.55mol/(100eV)and 0.45mol/(100eV),respectively.The oily aerosols with color of russet are produced when the styrene is treated by streamer.The results from XPS analysis indicate that the aerosols mainly consist of C-C and/or C-H,and the content of these two functional groups is about 82.52%,but the advanced oxidation products such as-COOR and-COOH are negligible.