Study of nanosecond pulsed power transmission technique and its application to ozone production

In using pulsed power, although ozone is produced with high efficiency, the concentration of ozone is not high. Introduction of reactor coupled with a capacitor and use of nanosecond pulsed power transmission technique is considered to improve the ozone concentration. The reactor coupled with a capacitor can suppress incidence of spark discharges between electrodes of the reactor. The concentration of ozone in using the reactor coupled with a capacitor was 1.85 g/Nm³, while that without the coupled capacitor was 1.73 g/Nm³. When pulsed repetition rate of pulsed power was increased, reactor coupled with a capacitor can control the temperature elevation and thermal decomposition of ozone by spark discharges. In the experiment of nanosecond pulsed power transmission technique, although voltage of nanosecond pulse decreases, double stacked pulse, pulse trains and bipolar pulses can be obtained for resistive load. When the decrease of voltage is considered, the observed multiplication ratio by double stacked lines well agrees with 1.2 which can be evaluated. The transmitted pulses through cables arrive successively to the load with time interval of 16 ns for pulse trains and bipolar pulses.