脉冲电晕放电与CuO/γ-Al_2O_3协同处理烟气中SO_2和NO的实验研究  

Experimental study on synergistic treatment of SO_2 and NO in smoky fog by means of pulse corona discharge and CuO/γ-Al_2O_3

作　　者：白明华[1] 李秋荣[1] 贺君[1] 郑海武[1] 高学伟[1] 

机构地区：[1]燕山大学环境与化学工程学院,河北秦皇岛066004

出　　处：《安全与环境学报》2007年第4期69-72,共4页Journal of Safety and Environment

基　　金：河北省自然科学基金项目(E2005000356)

摘　　要：研究了催化剂CuO/γ-Al2O3与脉冲电晕放电协同作用脱除烟气中的SO2和NO。结果表明,在100℃以下,CuO/γ-Al2O3与脉冲电晕放电协同作用具有较好的脱硫脱氮效果。当脉冲电压40kV,进口烟气温度80℃,出口烟气温度40℃,气体在烟道中的流速为1.3m/s,SO2的初始质量浓度为1400mg/m3,NO的初始质量浓度350mg/m3,SO2的脱除率达到85%,NO的脱除率达到30%。The present article intends to introduce its authors＇ research findings on the synergistic treatment of SO2 and NO in the smog by means of pulse corona discharge and CuO/γ - Al2O3 o As is known, the current research tendency has mainly been focused on the effect of desulphurization and denitrification with the application of CuO technique rather than on the effect of DeNOx with SO2, though studies in this area ahroad prove much more advanced than in China. More practicably speaking, since it is more complicated to study the synergistic effect, tire effect of physical and chemical changes, as well as the non-thermal plasma discharge and catalyst, the mechanisms of synergistic effect are by nature somewhat different due to the use of different reactors, catalysts and gas temperatures. So far as we know, little report has been puhlished on the suggested topic. As the result of our study, the catalyst of CuO/γ-Al2O3 can be taken as a highly efficient one under 100 ℃ when it is used together with pulsed eororta discharge for desulfurization and denitrifieation. Our experiments have also found that when the catalyst was used to promote the corona discharge, its surface would be bombarded by high energy. particles （such as electrons, activated atoms and ions）. And, then, when the catalyst particles are so strongly polarized as to produce the second electron emission, the desulfurization and denitrifieation reactions would be greatly enhanced under the effect of plasma field. According to our experiments, the most appropriate temperature for simultaneous removal of SO, and NO is 350 -450℃ , with CuO/γ-Al2O3 catalyst in use. Though the pulsed corona discharge is favorable for removing SO2, it has hardly any effect on removing NO. It can thus be thought that tire primary, reason of strengthening the desulfurization effect of the catalyst lies in its promotion to the heterogeneous desulfurization reaction. The second reason is that the catalyst has had a certain absorbability tor NO, thus leading to the fonnati

关 键 词：应用化学 氧化铜/γ-氧化铝 脉冲电晕 脱硫 脱氮 

分 类 号：X511[环境科学与工程—环境工程]