Ozone production by pulsed power in dry air

Abstract

Experimental investigations of high voltage short pulsed streamer discharges in dry air-fed ozonizer under various operating conditions are reported. Ozone concentration, energy input and ozone production yield were measured at various voltages (14 to 37 kV), pulse repetition rates (25 to 400 pulses per second, pps), fixed flow rates (1.5 to 3.0 l/min) and different gap spacings (10 to 20 mm) at a pressure of 1.01/spl times/10/sup 5/ Pa in dry air. A spiral wire made to a cylindrical configuration in concentric coaxial electrodes of varying dimensions was employed. A magnetic pulse compressor provided the voltage and current pulses. Higher voltage and higher repetition rates yielded higher concentrations of ozone at a fixed flow rate. Additionally the present investigations were extended to assess the performance of pulsed ozone generators using dry air under industrial conditions, where both the concentration of ozone (in parts per million, ppm) and its yield (in g/kWh) were maintained at high levels.