| Title |
Study on the Generation of Chemically Active Species using Air-plasma Discharging System |
| Authors |
김동석 ( Dong Seog Kim ) ; 박영식 ( Young Seek Park ) |
| Keywords |
Dielectric barrier discharge; H2O2; O3; OH radical; Oxidants; Plasma |
| Abstract |
High-voltage dielectric discharges are an emerging technique in environmental pollutant degradation, which that are characterized by the production of hydroxyl radicals as the primary degradation species. The initiation and propagation of the electrical discharges depends on several physical, chemical, and electrical parameters such as 1st and 2nd voltage of power, gas supply, conductivity and pH. These parameters also influence the physical and chemical characteristics of the discharges, including the production of reactive species such as·OH, H2O2 and O3. The experimental results showed that the optimum 1st voltage and air flow rate for RNO (N-Dimethyl-4-nitrosoaniline, indicator of the generation of OH radical) degradation were 160 V (2nd voltage of is 15 kV) and 4 L/min, respectively. As the increased of the 2nd voltage (4 kV to 15 kV), RNO degradation, H2O2 and O3 generation were increased. The conductivity of the solution was not influencing the RNO degradation and H2O2 and O3 generation. The effects pH was not high on RNO degradation. However, the lower pH and the conductivity, the higher H2O2 and O3 generation were observed. |