脉冲电晕放电处理低浓度硫化氢气体

Removal of Hydrogen Sulfide in Waste Gases by Pulse Discharge Plasma

采用线筒式脉冲电晕反应器对硫化氢气体进行去除,考察了影响硫化氢去除率的主要参数。当气体的停留时间为17s、硫化氢的初始质量浓度约为100mg/m3、峰值电压为48kV时,对硫化氢的去除率接近96%,且增加峰值电压、气体停留时间或气体中的氧气含量可提高硫化氢的去除率。对放电作用下硫化氢的去除动力学进行了研究,并对硫化氢的分解产物进行了初步分析。

Sulfurcontaining compounds are the representative most odorous pollutants.In ~order to develop an economical and efficient deodorization method,plasma induced by pulsed ~corona discharge was used to treat the gases containing hydrogen sulfide.The main factors that ~influenced the ~removal efficiency of odorous compounds were investigated experimentally.When the gas ~residence time was 17s,the concentration of hydrogen sulfide was 100mg/m3 and the ~pulse ~voltage peak(V_p) was 48kV,the removal efficiency of hydrogen ~sulfide approximated to 96%.Increasing the pulse voltage peak(V_p)or the gas residence time would resultin higher ~removal ~efficiency .The discharge plasma method was more efficient in the treatment of the low ~concentration odorous gases.In addition,the reaction kinetics and mechanism for the ~decomposition of hydrogen sulfide were discussed.An expression similar to MichaelisMenten model could be used to describe the reaction kinetics sulfur dioxide,sulfur trioxide or sulfuric acid were the main decomposition products.Moreover,ozone was also the product from ~discharge plasma,which could be further used as a deodorizer to decrease the sulfurcontaining odorous compounds.