Simultaneous oxidation of NO,SO_2 and Hg^0 from flue gas by pulsed corona discharge

查看全文 作　　者：XU Fei,LUO Zhongyang,CAO Wei,WANG Peng,WEI Bo,GAO Xiang,FANG Mengxiang,CEN Kefa State key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China.

出　　处：《Journal of Environmental Sciences》索引2009年第21卷第3期,共5页

基　　金：supported by the Science and Technology Research of Department of Education of China (No. 0305,03087) 摘　　要：A process capable of simultaneously oxidizing NO,SO2,and Hg0 was proposed,using a high-voltage and short-duration positive pulsed corona discharge.By focusing on NO,SO2,and Hg0 oxidation effciencies,the influences of pulse peak voltage,pulse frequency,initial concentration,electrode number,residence time and water vapor addition were investigated.The results indicate that NO,SO2 and Hg0 oxidation effciencies depend primarily on the radicals(OH,HO2,O) and the active species(O3,H2O2,etc.) produced by the pulsed corona discharge.The NO,SO2 and Hg0 oxidation effciencies could be improved as pulse peak voltage,pulse frequency,electrode number and residence time increased,but they were reduced with increasing initial concentrations.By adding water vapor,the SO2 oxidation effciency was improved remarkably,while the NO oxidation effciency decreased slightly.In our experiments,the simultaneous NO,SO2,and Hg0 oxidation effciencies reached to 40%,98%,and 55% with the initial concentrations 479 mg/m3,1040 mg/m3,and 15.0 μg/m3,respectively. 关键词：脉冲电晕放电一氧化氮二氧化硫氧化效率汞烟气峰值电压初始浓度

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Simultaneous oxidation of NO,SO_2 and Hg^0 from flue gas by pulsed corona discharge

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