Vol. 11, No.1, pp.112-127 (2017)
Water Treatment by Dielectric Barrier Discharge Tube with Vapor Flow
T. Shibata1 and H. Nishiyama2
1Formly Graduate School of Engineering, Tohoku University, Japan
2Institute 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