Water Treatment by Dielectric Barrier Discharge Tube with Vapor Flow
T. Shibata1 and H. Nishiyama2
1 Formly Graduate School of Engineering, Tohoku University, Japan
2 Institute of Fluid Science, Tohoku University, Japan
Abstract
Non-thermal plasma technologies with water vapor have been developed for a wide range of applications. In this study, a water treatment which introduces a vaporized solution into a coaxial dielectric barrier discharge (DBD) tube using Ar was investigated experimentally. To clarify the organic decomposition characteristics, acetic acid was decomposed by this treatment. A diluted acetic acid solution was vaporized by a water vaporizer in advance and introduced into the DBD tube. The residence time of the water vapor introduced into the discharge area in a DBD tube was approximately 6-8 ms. Acetic acid was effectively decomposed and the decomposition ratio reached almost 70% for small water flow rate, despite the short residence time, which is superior to the mist plasma treatment.
Keywords - Water treatment, DBD tube, vapor flow, organic pollutants
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