Study On Removal Of Ester Waste Gas By Corona Discharge

The ecological environment on the earth is increasingly affected by atmospheric pollutants.Among volatile organic compounds,acetate waste gas is an important part of it.However,when our traditional technology is aimed at low concentrations of volatile organic compounds,the disadvantages of low processing efficiency and large footprint limit its application in this area.In recent years,non-thermal plasma technology has great potential for the removal of airborne volatile organic compounds.However,the simple application of non-thermal plasma technology will have the problem of low efficiency,and it is easy to produce by-products such as O3 photochemical pollutants and aerosols.In order to solve the problem of low degradation efficiency of volatile organic compounds,the technique of using non-thermal plasma co-catalyst has emerged at the historic moment and received extensive attention.This article focuses on the pin-plate DC corona discharge method combined with Mn-based catalysts for the degradation of acetate exhaust gas.The main content and results of this article are as follows:First,in the form of a separate corona discharge,a needle-plate device is used to generate non-thermal plasma to degrade acetate,and the influence of operating conditions was investigated.Among them,the applied voltage is positively related to the degradation efficiency of acetates.When the voltage is 36 kV,ethyl acetate The removal rate reached57.14%,and the removal rate of butyl acetate reached 54.86%.The initial concentration has little effect on the degradation efficiency of acetates;The energy rate is negatively correlated with the applied voltage and positively correlated with the initial concentration.Secondly,the corona discharge is combined with the catalyst to explore the optimal corona discharge coupling catalytic mode.It is two-stage?PPC?system.The 15wt%MnOx load is placed in the system,and the degradation effect of ethyl acetate is the best;As an important discharge parameter,SIE is positively related to the degradation efficiency of ethyl acetate.When SIE is 25 J/L,after MnOx?MN?increased,the degradation of ethyl acetate by the PPC system is 91.14%,and the CO₂ selectivity is 79.39%,O₃ concentration is 107mg/m³;In the PPC system,the mixture of ethyl acetate and butyl acetate was degraded.The degradation efficiency of ethyl acetate was 91.49%,the degradation efficiency of butyl acetate was 90.16%,the CO₂ selectivity was 76.91%.Finally,the doped MnOx catalyst was used to degrade butyl acetate,and the possible degradation paths during the degradation of butyl acetate were discussed.This provides feasibility and experimental basis for subsequent research.