Review

  • Journal of Nuclear Fuel Cycle and Waste Technology
  • Volume 9(3); 2011
  • Article

Journal of Nuclear Fuel Cycle and Waste Technology 2011;9(3):121-129. Published online: Sep, 30, 2011

PDF Citation

The Removal of NOx by Mediated Electrochemical Oxidation Using Ag(II) As a Mediator

  • Min-Woo Lee ; So-Jin Park ; Kune-Woo Lee ; Wang-Kyu Choi
Abstract

The effects of the applied current density, the AgNO3 concentration, the scrubbing liquid flow rate and the NO-air mixed gas flow rate on the NO removal efficiency were investigated by using Ag2+ mediated electrochemical oxidation (MEO). Results showed that the NO removal efficiency increased with increasing the applied current density. The effect of the AgNO3 concentration on the NO removal efficiency was negligibly small in the concentration of AgNO3 above 0.1 M. When the scrubbing liquid flow rate increased, the NO removal efficiency was gradually increased. On the other hands, the NO removal efficiency decreased with increasing the NO-air mixed gas flow rate. As a result of the treatment of NO-air mixed gas by using the MEO process with the optimum operating condition and the chemical absorption process using 3 M HNO3 solution as a scrubbing liquid, the removal efficiency of NO and NOx was achieved as 95% and 63%, respectively.

Keywords

NO,Mediated electrochemical oxidation (MEO),Current density,Removal efficiency,Gas scrubber