Dielectric barrier discharges provide an effective method of industrial ozone generation. The process is usually driven by an ac power supply at a few hundred hertz, although attempts have been made to apply higher frequencies to increase the power density and ozone concentration. However, the population of low-energy electrons produced under continuous ac energization makes a large contribution to ozone dissociation and heat production, leading to an electrical ozone-conversion efficiency lower than 20%. By replacing the continuous ac excitation with a high voltage pulsed excitation, with short duration pulses, it should be possible to reduce the low energy electron population and therefore increase the electrical ozone conversion efficiency.
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