Analysis of Low Frequency on Dielectric Barrier Discharge Plasma Reactor for Ozone Production

The current study investigates the effects of pulse frequency and magnitude of AC voltage applied on a cylindrical dielectric barrier discharge (DBD) plasma reactor with mesh electrodes, operated at atmospheric pressure, for ozone production have been systematically investigated. Results showed that increasing the discharge current and the operational power consumed by the DBD plasma reactor, which were proportional to the square and the cubic polynomials of the operational voltage, respectively, were essential for enhancing the concentration of ozone produced by the DBD plasma reactor. With pulse frequency being in the range of 500 - 900 Hz, the AC voltage of 9, 8 and 7 kV applied to the DBD reactor produced ozone with the concentration in the range of 140 - 180, 110 - 150 and 95 - 110 mg/L, respectively. The effect of pulse frequency is reflected by different frequency dependencies; i.e. in the ranges of 300 - 600, 600 - 900 and 1,000 - 1,200 Hz, which produce ozone with concentrations of 10 - 185, 10 - 220 and 10 - 225 mg/L based on a power consumption of 1.5 - 30, 10 - 80 and 15 - 200 W, respectively. The best performance, in terms of the efficiency, capacity and stability of ozone production as well as the input power efficiency and the specific energy input, was achieved at pulse frequency of 500 Hz. Overall, this study provides insights into the construction of an efficient DBD plasma-based ozone generator with low power input requirements. HIGHLIGHTS Optimized DBD plasma reactor for ozone generation at atmospheric pressure. Voltage increase leads to quadratic current rise and cubic power growth. The pulse frequency for optimum ozone production efficiency was found to be at 500 Hz. Frequencies between 500 - 900 Hz ensure stable and efficient ozone output. Enhanced ozone generation with low power input requirements. GRAPHICAL ABSTRACT