Reduction of NO_x by a DC Positive Streamer Corona Discharge with Wire-to-Plane Electrodes

Abstract

Recently, a non-thermal plasma which is produced by a silent discharge, surface discharge and double discharge in which many initial electrons are produced by a pre-discharge have been used for the effective production of ozone, and the treatment of NO_x and VOC (Volatile Organic Compounds). In this paper, a DC positive streamer corona with a wire-to-plane electrode is used to reduce the NO_x (NO and NO₂) which is fed from the gas cylinder filled by NO/N₂ or NO/N₂/O₂ mixture gas. The effect of the parallel discharges generated by two or three pairs of electrodes on the reduction of NO is also measured.