Effect of Plasma-Activated Time for Ozone Generation in SDBD System under Pulse and Sinusoidal Excitation

In the surface dielectric barrier discharge (SDBD) excitation schema, different power source topologies, such as the pulse and sinusoidal voltage inverters, are used to obtain the plasma. The inverter design is a critical element for consumer applications. However, some works in the literature have explained plasma properties and high-voltage excitation, but no clear definition has been identified to select a plasma property for a particular application. In general, SDBD is used for nonthermal plasma applications such as air purification and sterilization. Plasma generates reactive species that can react with target substances. Therefore, the reactive species generation rate greatly affects the plasma reaction performance. In addition, some researchers compare the O3 generation rate with sinusoidal and pulse power supply, but they do not focus enough on the plasma which determines the electrical properties. In this study, the plasma-activated time (PAT) is introduced to link the plasma properties and electrical parameters. Sinusoidal and pulse voltage excitation characteristics and O3 generation rates are used to experiment with this concept. The generation of reactive species is tested by measuring the O3 generation rate under fixed electrical and environmental conditions such as voltage, temperature, humidity, frequency, and PAT.