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A Basic Study of Plasma Reactor of Dielectric Barrier Discharge for the Water Treatment

수처리용 유전체장벽 플라즈마 반응기에 대한 기초 연구

Kim, Dong-Seog;Park, Young-Seek
김동석;박영식

  • Received : 2011.02.11
  • Accepted : 2011.04.05
  • Published : 2011.05.31

Abstract

This study investigated the degradation of N, N-Dimethyl-4-nitrosoaniline (RNO, indicator of the generation of OH radical) by using dielectric barrier discharge (DBD) plasma. The DBD plasma reactor of this study consisted of a quartz dielectric tube, titanium discharge (inner) and ground (outer) electrode. The effect of shape (rod, spring and pipe) of ground electrode, diameter (9~30 mm) of ground electrode of spring shape and inside diameter (4~13 mm) of quartz tube, electrode diameter (1~4 mm), electrode materials (SUS, Ti, iron, Cu and W), height difference of discharge and ground electrode (1~15.5 cm) and gas flow rate (1~7 L/min) were evaluated. The experimental results showed that shape of ground electrode and materials of ground and discharge electrode were not influenced the RNO degradation. The thinner the diameter of discharge and ground electrode, the higher RNO degradation rate observed. The effect of height gap of discharge between ground electrode on RNO degradation was not high within the experimented value. Among the experimented parameters, inside diameter of quartz tube and gas flow rate were most important parameters which are influenced the decomposition of RNO. Optimum inside diameter of quartz tube and gas flow rate were 7 mm and 4 L/min, respectively.

Keywords

Dielectric Barrier Discharge;Water Plasma;OH radical;Design parameter;Wastewater treatment

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Acknowledgement

Supported by : 한국연구재단