Kinetic Simulations of Volatile Organic Compounds Decomposition by Non-thermal Plasma Treatment

摘要

Volatile organic compounds (VOCs) decomposition by non-thermal plasma (NTP) has been receiving increasing attention from the scientific communities due to its advantages of easy operation, high efficiency, energy saving, and non-secondary pollution. But most of the researches are doing experiments and existing experiment methods cannot observe the micro physical and chemical processes. In order to make up for the deficiency of the experiment, herein, a numerical method was developed to analyze the decomposition behavior of HCN, C3H3N, C3H8, C3H6, CO, and NO in the VOCs treatment by NTP. Results indicated that increasing electron density or energy was beneficial to VOCs decomposition, but when the electron density and energy was too high, the promotion would be weakened. The influences of initial concentration of O-2 and H2O on different VOCs decomposition were totally different. The increase of initial concentration of oxygen was beneficial to the decomposition of HCN, C3H8, CO, and NO, but the high concentration of oxygen could promote to generate C3H6 at the initial reaction stage. The decomposition of HCN and C3H3N are not restricted by dry or wet conditions, but the increase of the concentration of water vapor is advantageous to the decomposition of C3H8, CO, and NO.