Enhancing ozone production in dielectric barrier discharge utilizing water as electrode

Abstract

Dielectric barrier discharge is widely used in applications such as ozone generation and surface treatment. This investigation studies the electrical diagnostics and ozone generation capability in a dielectric barrier discharge ozone generator utilizing water acting as the ground electrode for the first time. Results show that specific input energy peaks at 8 kHz when the frequency changes from 5 kHz to 10 kHz. Results also show that the maximum ozone generation efficiency reaches 391.66 g/kWh at discharge frequency of 6 kHz. At power frequency of 7 kHz, the ozone generation efficiency reaches 231 g/kWh and the ozone concentration reaches about 12293.59 ppm. In addition, by comparing with the results of previous studies in the literature, it is concluded that the using water flow as the ground electrode can achieve high ozone efficiency at high ozone concentrations. This investigation provides a new method for high efficient ozone production.