In situ infrared of gas/particle conversion reaction of SO2, NO2 and NH3 mixture gases

Abstract

Abstract The gas/particle transformation reaction of gaseous precursors (SO2, NO2, NH3) at high concentrations is the main pathway for the generation of secondary inorganic particulate matter (SIPM), and the change of SIPM concentration is closely related to the change of PM2.5 mass concentration, so the control of the emission of SO2, NO2, and NH3 is the key to reduce the formation of secondary inorganic particulate matter (SIPM). This paper focuses on the gas/particle transformation process of SO2, NO2 and NH3 gas mixture in the atmosphere and explores the influence of environmental factors on the gas/particle transformation reaction. The results show that in the gas mixture of SO2, NO2 and NH3, NH3 is favorable for the gas/granule transformation reaction of mineral particles to generate (NH4)2SO4 and NH4NO3 after the oxidation of SO2 and NO2 into SO2- 4 and NO- 3. The environmental conditions have an effect on the gas/granule transformation reaction of secondary inorganic ions, and the gas/granule transformation reaction is favorable for the gas/granule transformation reaction with the appropriate gas/granule ratio of the pollutants, a certain amount of relative humidity, and a certain amount of illumination is favorable for the gas/granule conversion reaction.