Influence of H₂O on a Simulation of the Discharge Induced Chemical Reactions in Exhaust Gas Using a Micro Discharge Model

Abstract

The chemical reactions by silent discharge were investigated using a model, which considers micro discharge structure and diffusion of species from discharge channel. This paper describes the influence of H₂O on the reaction paths and NO removal performances, under an assumption that H₂O does not change the discharge parameter. The principal result is that NO removal efficiency declines as H₂O increases. The reason of efficiency decline was analyzed by investigating reaction paths, and it was found that the suppression of O₃ formation due to the consumption of O radicals by OH and HO₂, and also NO formation by OH radicals are the reason of efficiency decline.