Experimental and theoretical study of ozone generation in pulsed positive dielectric barrier discharge

• Dimensional analysis is extended to the positive parallel DBD reactors.
• A numerical model is developed based on dimensional analysis theory.
• Discussion regarding the influence of the destruction factor is also included.

This paper studies ozone synthesis in a dielectric barrier discharge reactor powered by a high voltage positive pulse power supply with a short duration (∼400 ns). The influence of ozone concentration on the peak pulsed voltage (4.8 kV–20 kV), the pulse repetition rate (50 pps–300 pps) and gas flow rate is investigated. It is shown that ozone concentration reaches its maximum of 74.1 g/m3 at pulse repetition rate of 300 pps and applied voltage of 20 kV. A numerical model which describes the influence of both electrical and discharge configuration parameters on ozone concentration is developed. The ozone destruction factor is taken into account. The derived equation turns out to be validated by comparing the experimental results with numerical data. This investigation offers substantial insight in practical design of ozonizers and selection of an appropriate set of operating conditions.