介质阻挡放电降解流动态二甲基二硫废气

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0.067 s、外施电压7500 V、进气量8.4m3·h-1的条件下,进气浓度为80 mg·m-3 DMDS的降解率达到64.3%,体积降解比量为2.26×10-2L·s-1·W-1,绝对处理量达到430 mg·h-1.

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

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. Akinetic model was developed to simulate the degradation of DMDSvia DBD. Reaction mechanisms are discussed based on the products seen in FT-IRspectra. 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 m³·h^-1 and DMDSconcentration 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.