反应气耦合等离子体降解沙林模拟剂

Degradation of sarin simulant by plasma coupling reaction gases

采用水蒸气、氨气、过氧化氢气雾和臭氧4种气体对沙林模拟剂氟磷酸二异丙酯(DFP)进行降解研究,发现臭氧对DFP具有较好的降解作用,在流量200 L/h,DFP初始浓度50 mg/m3时,降解率最高可达56.1%。对高浓度DFP(大于80 mg/m3)进行降解研究时,等离子体单独作用最高降解率为89%,而添加臭氧后的降解率都在95%以上。计算得到臭氧作用的能量利用率为0.05 mg/(W·h),等离子体的能量利用率为0.55 mg/(W·h),而添加臭氧后的等离子体能量利用率为0.68 mg/(W·h)明显高于臭氧和等离子体能量利用率之和,因此对高浓度DFP进行处理时,臭氧与等离子体存在耦合作用。对等离子体和臭氧耦合等离子体降解DFP反应进行了产物分析,发现主要的降解产物基本一致,但是臭氧的存在能使降解更加彻底。

The degradation of diisopropyl fluorophosphate(DFP,a stimulant of sarin) by four reaction gases(water vapor,ammonia,ozone,peroxide aerosol)was investigated. The result showed that ozone's effect on DFP was the best,and the degradation efficiency reached 56. 1% with gas flue of 200 L /h,DFP initial concentration of 50 mg /m3. When the initial concentration of DFP was over 80 mg /m3,the degradation efficiency reached 89% in plasma,and the efficiency was all over 95% in plasma coupling ozone. The calculation showed that the energy utilization rate of ozone was 0. 05 mg /(W·h),and the rate of plasma was 0. 55 mg /(W·h),while the rate of plasma added ozone was 0. 68 mg /(W·h) higher than the rate sum of ozone and plasma. So the coupling effect was existed if the initial concentration of DFP was over 80 mg /m3. The products of DFP with plasma or plasma coupling ozone were analyzed. The result showed that the main products were coincident elementarily,but the product was more thorough with the addition of ozone.