Abstract
Dielectric barrier discharge plasma was used to oxidize trichloroethylene (TCE) in 21% of O 2 in carriers of N 2 and He . The degradation products of TCE were analyzed using gas chromatography mass spectrometry. TCE was decomposed completely at optimum energy density of 260 and 300 J/l for He and N 2, respectively and its conversion followed zero order reaction. The TCE removal efficiency is decreased in humid air due to interception of reactive intermediates by OH radicals.
Highlights
Volatile organic compounds (VOCs) are the major pollutants in air, and are harmful to human health and environment
TCE which is halogenated VOCs is widely used as solvent, cleaning agents and extractants in various industrial fields.[1]
Concentration of TCE has linear relation with residence time and prolonging the residence time provides longer time for TCE molecules to be attacked by radicals, resulting in higher conversion of VOCs
Summary
Volatile organic compounds (VOCs) are the major pollutants in air, and are harmful to human health and environment. Plasma treatment due to its reliability, energy efficiency and possibility of post-processed gas treatments, attracts more. This is an Open Access article published by World Scientific Publishing Company. Plasma in its different form such as RF, pulsed corona discharge and dielectric barrier discharge (DBD) can be used for degradation of VOCs at wide range of flow rates and concentrations. Due to its atmospheric pressure and room temperature, and presence of dielectric barriers which prevent contamination of analyte gas with electrodes, DBD plasma has been used widely for abatement of VOCs.[2]. Specific input energy (SIE) of the discharge was calculated by following relation: SIE (J/l) =power (W)/ gas flow rate (l/s)
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