Atmospheric environment

Simultaneous oxidation of NO, SO2 and Hg0 from flue gasby pulsed corona discharge

XU Fei , LUO Zhongyang , CAO Wei , WANG Peng , WEI Bo , GAO Xiang , FANG Mengxiang , CEN Kefa


Received April 18, 2008,Revised July 15, 2008, Accepted , Available online

Volume 21,2009,Pages 328-332

  • Summary
  • References
  • Related Articles
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 e ciencies, 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 e ciencies 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 e ciencies 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 e ciency was improved remarkably, while the NO oxidation e ciency decreased slightly. In our experiments, the simultaneous NO, SO2, and Hg0 oxidation e ciencies reached to 40%, 98%, and 55% with the initial concentrations 479 mg/m3, 1040 mg/m3, and 15.0 g/m3, respectively.

Copyright © Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.京ICP备05002858号-3