Vol. 12, No.2, pp.103-108 (2019)
Influence of Gas Humidity and Gas Flow Rate on Ozone Production and Ethylene Decomposition Using Dielectric Barrier Discharge
A. Oka1, K. Takahashi1, 2, K. Takaki1, 2, S. Ishida3, and T. Terazawa3
1Faculty of Science and Engineering, Iwate University, Japan
2Zhejiang University, China
Abstract
An influence of relative humidity and gas flow rate on O3 production and ethylene decomposition using dielectric barrier discharge is evaluated. The removal of C2H4 is also investigated in the presence of manganese dioxide (MnO2). In the present experiment, N2 and O2 gas mixture is fed into the DBD reactor with a mixing rate of N2: O2 = 8:2 at 5 or 10 L/min gas flow rate. C2H4 gas is diluted by N2 to 8 ppm. The relative humidity of the gas is adjusted by bubbling gas through water at 0 and 80%RH. The experimental result shows that the O3 concentration and yield with bubbling are lower than without bubbling and it is almost independent of gas flow rate. The concentration of C2H4 without bubbling is lower than that with bubbling. With bubbling, the concentration of C2H4 with catalyst is higher than that without catalyst.
Keywords - Dielectric barrier discharge, ozone, ethylene, relative humidity, gas temperature