Improvement of Ozone Generation Characteristics with Shorter Rise Time of Nanosecond Pulse Voltage

摘要

Ozone has a variety of positive characteristics such as strong oxidation power and non-residual toxicity; therefore, it is expected as one of the next-generation oxidants. There are various applications using ozone, for instance, clarification of drinking water, industrial wastewater treatment, and so on. At present, though ozone generation by a dielectric barrier discharge is the main method for commercial ozonizers, it has some disadvantage, which is a lower energy efficiency for plasma phase because the most of the input energy is lost as heat. In the recent years, the nanosecond pulsed power generator (NS-PG), which can generate a pulsed voltage with 5 ns duration have been developed, and the nanosecond (ns) pulsed discharge leads the higher energy efficiency of the ozone generation. However, there is still problems that the maximum ozone concentration using the nanosecond pulsed discharge has been saturated at approximately 40 g/m