Experimental Study On The Destruction Of Volatile Organic Compounds By Pulse Corona Combined With Absorption

This paper investigated the removals of volatile organic compounds (VOCs) such as toluene, dichloromethane (DCE) and trichloroethylene (TCE) by pulsed corona combined with absorption.In the experiment, the influences of operation parameters like pulse voltage, pulse repetition rate, gas residence time, oxygen concentration and initial concentration of VOCs were investigated. Experimental result showed that the increase of pulse voltage is helpful to the removal of VOCs. When the pulse voltage was increased from 15 kV to 25 kV, the removals of toluene, DCE and TCE increased from28.62%, 9.77% and 32.67% to 62.64% 62.64% and to 65.72% respectively.With the increase of the gas residence time and oxygen in gas stream, the removals of these pollutants also increased. Among these three pollutants, TCE is much easier to decompose than toluene and DCE, which may be ascribed to their differences in chemical structures. The final products of the destructions were analyzed as CO, CO2 and H2O for toluene and CO, CO2 , H2O and HC1 for TCE and DCE.Aiming at improving the decomposition, a combination of pulsed corona reactor with downstream adsorption was devised. It was found that this kind of combination was helpful to the decomposition.Finally, an enlargement experiment was performed to evaluate the feasibility of this system to industrial application.