介质阻挡放电降解流动态二甲基二硫废气

Destruction of dimethyl disulfide in a gas flow system with dielectric barrier discharge

采用介质阻挡放电等离子体技术(Dielectric Barrier Discharge,DBD)处理常压下流动态气体中的有机硫恶臭气体二甲基二硫(Dimethyl Disulfide,DMDS).研究了不同停留时间、进气浓度及外施电压条件下DMDS的转化,推导了DBD处理DMDS的动力学模型,并根据傅立叶红外(FT-IR)产物分析探讨了反应机理.研究结果表明,DMDS降解产物主要为CO2、SO2和H2O.在停留时间0.067s、外施电压7500V、进气量8.4m·3h-1的条件下,进气浓度为80mg·m-3DMDS的降解率达到64.3%,体积降解比量为2.26×10-2L·s-·1W-1,绝对处理量达到430mg·h-1.

Dielectric barrier discharge （DBD） was employed to degrade the sulfur-containing compound dimethyl disulfide （ DMDS, CH3SSCH3 ） in a gas flow system at atmospheric pressure. Destruction of dimethyl disulfide was investigated at different residence times, inlet concentrations and voltages. A kinetic model was developed to simulate the degradation of DMDS via DBD. Reaction mechanisms are discussed based on the products seen in FT-IR spectra. The main products were CO2 , SO2 and H2O. For optimal experimental conditions （gas residence time of 0. 067 s, applied voltage of 7500 V, inlet volume of Q = 8.4 m^3·h^-1 and DMDS concentration of 80 mg·m^-3）, we observed a 64.3% destruction efficiency, 2.26×10^-2 L·s^-1·W^-1 unit decomposition volume and 430 mg·h^-1 absolute removal amount.