低温等离子体处理化工恶臭污染物硫化氢的研究

采用电晕放电低温等离子体处理模拟硫化氢恶臭气体,考察了输入功率、初始浓度、气体湿度、停留时间等因素对降解效果和能量效率的影响,同时对反应过程进行了动力学研究。研究表明：输入功率以及停留时间对硫化氢降解的影响是积极的,但能量效率随着两者的增加先增大后减小。硫化氢的降解率随着初始浓度的增加而降低,而能量效率随着初始浓度的增加而增加。在气体湿度增加初期,硫化氢降解率和能量效率均随着气体湿度的增加而增加,当气体湿度为50%时达到最大值,然而随着气体湿度的进一步增加,其降解率和能量效率反而降低。对电晕放电低温等离子体处理硫化氢的反应动力学进行了分析,得到硫化氢的反应速率常数为kH2S=0.356 8 m3/（W·h）。

The Degradation of H2S Odor in Wastewater by Non-thermal Plasma Technology

Non-thermal plasma （NTP） reactor was employed to degrade the H2S odor. The influencing factors were investigated such as input power, initial concentrations, relative humidity and resident time on H2S degradation and energy efficiency. And the macro-dynamics of reaction mechanism were also analyzed. The results showed that the H2S degradation increased with increasing input power and residence time, while the energy efficiency increased with increasing input power and residence time and then decreased. H2S degradation decreased with increasing initial concentration, while energy efficiency increased with increasing initial concentration. In the early stage of increasing humidity, H2S degradation and energy efficiency increased with elevated relative humidity to 50%, which was followed by a decrease with a further increase in relative humidity. The reaction kinetic of H2S was also analyzed and discussed, and the reaction rate constant of H2S was 0.356 8 m3/（W.h）.