介质阻挡放电低温等离子体降解甲硫醚

Decomposition of Dimethyl Sulfide with Non-Thermal Plasma Induced by Dielectric Barrier Discharge

在线-筒式反应器中,应用介质阻挡放电低温等离子体对甲硫醚的降解进行实验研究。采用BPFN型窄脉冲高压电源供电,考察了重复频率、峰值电压、初始浓度、气体流量等单因素对去除率的影响。结果表明,介质阻挡放电能够有效地去除甲硫醚废气。甲硫醚去除率随着重复频率的增加而上升,但能量利用率却降低,本实验中采用重复频率为100Hz较合适。当气体流量为1000mL·min-1、初始浓度为906mg·m-3时,甲硫醚去除率可达100%,此时能量利用率为0.864mg·kJ-1。当甲硫醚初始浓度为525mg·L-1,气体流量由1000mL·min-1增加至2000mL·min-1时,甲硫醚去除率由100%降低至85.7%,但是能量利用率却由0.706mg·kJ-1升高至1.210mg·kJ-1。

Decomposition of dimethyl sulfide （DMS） by non-thermal plasma induced by dielectric barrier discharge （DBD） in a wire-tube reactor was investigated. A new type of high pulse voltage source with Blumlein pulse forming network （BPEN） was adopted in the experiments, and the results show that the DMS could be removed effectively in the DBD reactor. The effects of the important parameters influencing the DMS removal efficiency, such as the pulse frequency, peak voltage, initial concentration of DMS and gas flow rate, were studied. The suitable pulse frequency for decomposition of DMS was found to be 100 Hz, and when the initial concentration of DMS is 906 mg.m^-3and gas flow rate is 1000 mL-min^-1, using the suitable pulse frequency mentioned, the DMS removal efficiency can reach 100% and the energy yield is 0.864 mg.kJ^-1. It was also found that when the gas flow rate increases from 1000 mL.min^-1 to 2000 mL·min^-1, the removal efficiency of DMS with initial concentration of 525 mg.m^-3 decreases from 100% to 85.7%, while the energy yield increases from 0.706 mg.kJ^-1 to 1.210 mg.kJ^-1.