Influence of pulse width on decolorization efficiency of organic dye by discharge inside bubble in water

11th Asia Pacific Conference on Plasma Science and Technology;25th Symposium on Plasma Science for Materials

Kawano, S.^1 ; Wada, K.^1 ; Kakuta, T.^1 ; Takaki, K.^1,2 ; Satta, N.^3 ; Takahashi, K.^4

Faculty of Engineering, Iwate University, 4-3-5, Ueda, Morioka, Iwate 020-8551, Japan^1

Soft-Path Engineering Research Center (SPERC), Iwate University, 4-3-5, Ueda, Morioka, Iwate 020-8551, Japan^2

Faculty of Agriculture, Iwate University, 3-18-8, Ueda, Morioka, Iwate 020-8550, Japan^3

Shishido Electrostatic, LTD., 4-7-21, Chigasaki-higashi, Yokohama, Tsuzuki-ku, Kanagawa 224-0033, Japan^4

关键词: Discharge reactors;    Fast recovery diodes;    High voltage pulse;    Inductive energy storage;    Magnetic pulse compression circuits;    Pulsed-power generators;    Semiconductor opening switch;    Solution conductivity;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/441/1/012007/pdf
DOI  :  10.1088/1742-6596/441/1/012007

来源: IOP

【 摘 要 】

Decolorization of an organic dye by discharge in high conductive water using a pulsed power generator and a discharge reactor was investigated. The discharge reactor consisted of a glass tube and a tungsten wire inserted into the glass tube, which was immersed in the water. Room air was injected into the glass tube to generate bubbles in the water. High voltage pulses were generated by an inductive-energy storage system using semiconductor opening switch (SOS) and by a magnetic pulse compression circuit. Fast recovery diodes were used as SOS diode in the inductive-energy storage system. The pulse width was changed in range from 10 to 1200 ns. The high voltage was applied to the tungsten wire. Indigo carmine was employed as a specimen to evaluate decolorization efficiency. Potassium nitrate was used to adjust the solution conductivity. The dye solution was successfully decolorized at 7 mS/cm conductivity. Energy efficiency for decolorization increased from 0.680 to 55.6 mg/Wh with decreasing the pulse width from 1200 to 10 ns owing to the reduction of ohmic loss.