低温等离子体治理H2S污染的实验研究

低温等离子体技术是一种高效、快速的污染消除技术，国内外都在对其进行广泛而深入的研究。采用脉冲电晕放电等离子体对空气中的硫化氢进行降解研究，探索了、脉冲峰压、脉冲频率、气体流量以及气体初始浓度对净化效果的影响，气体浓度由气相色谱仪测定。结果表明，脉冲电晕放电可以有效消除硫化氢污染，净化率随脉冲峰压和脉冲频率的增加而提高，随气体初始浓度和流量的增加而下降，且在初始浓度360mg／m^2、流量1200mL／min、脉冲峰压30kV、脉冲频率80Hz的条件下，处理后的气体中已检测不到H2S，根据色谱检测限（0．29mg／m^3）计算出的净化率≥99．92％。采用离子色谱对产物进行了定性分析，发现H2S经放电处理后主要产物为SO2和SO3。

Experimental study on decontamination of H2S by low temperature plasma

Plasma technology is an effective and rapid pollutant treatment technology, and has been studied deeply at home and abroad. The degradation of hydrogen sulfide by pulsed corona discharge plasma was investigated. The pulse peak voltage, pulse frequency, initial concentration and gas flow, which affect the decontamination efficiency were studied. The initial concentration was detected by GC. The results show that H2S can be decontaminated by pulse corona discharge, and the decontamination efficiency increases as the rising of pulse peak voltage and pulse frequency, while decreases with the rising of gas initial concentration and flux. Typically, no H2S could be detected in the outlet gas under the condition of 360 mg/m^3 of initial concentration, 1200 mL/ min of gas flow, 30 kV of pulse voltage, and 80 Hz of pulse frequency. So the decontamination efficiency calculated by GC detection limit, which is 0.29 mg/m^3 ,is not less than 99.92%. The qualitative analysis for the products was carried out by ion chromatograph, and sulfur dioxide and sulfur trioxide were found in the outlet gas after discharge.