| Title |
Study on the Generation of Chemically Active Species Using Gas-liquid Mixing Plasma Discharging System |
| Authors |
김동석 ( Dong Seong Kim ) ; 박영식 ( Young Seek Park ) |
| DOI |
https://doi.org/10.15681/KSWE.2014.30.4.394 |
| Keywords |
Dielectric barrier discharge; H2O2; O3; OH radical; Oxidants; Plasma |
| Abstract |
High-voltage dielectric discharges are an emerging technique in environmental pollutant degradation, which 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 oxygen 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 2nd voltage (4 kV to 15 kV) was increase, RNO degradation was increased and, generated H2O2 and O3 concentration were increased. The conductivity of the solution was not influencing the RNO degradation, H2O2 and O3 generation. The pH effect on RNO degradation was not high. However, the lower pH and the conductivity, the higher H2O2 and O3 generation were observed. |