介质阻挡放电等离子体洗消芥子气染毒空气的研究

采用板-板式介质阻挡放电反应器对芥子气的模拟剂2-氯乙基乙基硫醚(2-Chloroethyl ethyl sulfide,2-CEES)进行洗消实验研究,并探讨了放电功率和气体流量对洗消率的影响.研究发现,在放电功率70W、气体流量75L·h-1的条件下对初始浓度0～280 mg·m-3的染毒空气洗消效果较好.因此,在该条件下,对芥子气染毒空气进行深入洗消研究.结果表明,当初始浓度低于150.2 mg·m-3时洗消后尾气的残余浓度低于安全允许浓度(0.0083mg·m-3).同时,采用GC-MS和离子色谱对洗消产物进行分析,发现介质阻挡放电等离子体将芥子气分解成H2O、CO2、SO3、HCl、芥子砜(ClCH2 CH2 SO2 CH2 CH2 Cl)和芥子亚砜(ClCH2 CH2 SOCH2 CH2Cl)等.

Study on the decontamination of mustard in air by using dielectric barrier discharge plasma

Aplate-plate dielectric barrier discharge reactor was used to decontaminate 2-Chloroethyl ethyl sulfide (2-CEES), a surrogate of mustard. The effect of discharge power and gas flow on the decontamination efficiency of 2-CEESwas studied, and the maximal decontamination efficiency could be achieved under the condition of 70Wof discharge power and 75L·h^-1 of gas flow, with the initial concentration varied from 0 to 280mg·m^-3. Then the decontamination experiment for mustard was carried out at this more optimal condition. The results indicated that mustard in air with an initial concentration of less than 150.2mg·m^-3 could be decontaminated to lower than 0.0083mg·m^-3, the permissible safety concentration. The decontamination products were H₂O, CO₂, HCl, SO₃, bis(2-chloroethyl) sulphone and bis(2-chloroethyl) sulphoxide which were analyzed by GC-MSand ion chromatograph.