Comparison of One‐ and Zero‐Dimensional Reaction Models of Liquid‐Phase Radicals for Plasma Generated on Gas–Liquid Interface

Abstract

SUMMARYOne‐ and zero‐dimensional (0D) numerical models of plasma generated over a solution were established. Gas‐ and liquid‐phase reactions and mass transfer through a gas–liquid interface for OH radical, hydrogen peroxide, and HO2 radical were considered, and the decomposition of acetic acid in water was evaluated. In a 1D model with a small diffusion coefficient (10−9 m2/s) in liquid phase, the diffusion rate was the rate‐limiting factor of the decomposition of acetic acid. With such a small diffusion coefficient, the concentrations of OH radical and acetic acid in the 0D model showed large differences from those in the 1D model. When the time scale of diffusion in the liquid phase was shorter than that of the decomposition reaction between OH radical and acetic acid, reasonable results were obtained in the 0D model.