Ozone Synthesis Using Shielded Sliding Discharge: Effect of Oxygen Content and Positive versus Negative Streamer Mode

A shielded sliding discharge reactor operated with nanosecond pulsed power produced ozone with an increased energy yield and in concentrations comparable to commercially available ozone generators. The ozone concentration from air was 4 to 13 g/Nm 3 with an energy yield of 110 to 75 g/kW·h in negative streamers and 4 to 9 g/Nm 3 with an energy yield of 65 to 40 g/kW·h in positive streamers. As the oxygen content in the feed gas was gradually increased, the ozone concentration and energy yield increased, while the difference between efficiencies of positive and negative streamer mode diminished. Ozone concentration from pure oxygen in both positive and negative streamer mode was 10 to 50 g/Nm 3 with an energy yield of 250 to 120 g/kW·h.