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.