CAJ | 학술논문

采用介质涂覆的球-筒电极结构,用以脉冲电压条件下在水中产生放电,通过比色法检测放电产生的过氧化氢,研究了不同电压脉冲幅值、脉冲宽度(储能电容的大小)、水的电导率以及脉冲频率对过氧化氢产生速率的影响,实验结果表明过氧化氢的产率随电压脉冲幅值的增大而增大.当电压脉冲幅值足够高时,水中放电由流注放电形式转换为电弧放电形式,此时过氧化氢产率也大幅提高,而在相同电压条件下,随水的电导率的增大,过氧化氢的产率减小.在相同电压下,脉冲频率的增大,导致放电平均功率增大,水中放电产生过氧化氢的浓度提高.在3.3 W功率时,120 min后水中过氧化氢浓度达到0.2 mmol/L,从而证明了所用电极结构的优越性.
채용개질도복적구-통전겁결구,용이맥충전압조건하재수중산생방전,통과비색법검측방전산생적과양화경,연구료불동전압맥충폭치、맥충관도(저능전용적대소)、수적전도솔이급맥충빈솔대과양화경산생속솔적영향,실험결과표명과양화경적산솔수전압맥충폭치적증대이증대.당전압맥충폭치족구고시,수중방전유류주방전형식전환위전호방전형식,차시과양화경산솔야대폭제고,이재상동전압조건하,수수적전도솔적증대,과양화경적산솔감소.재상동전압하,맥충빈솔적증대,도치방전평균공솔증대,수중방전산생과양화경적농도제고.재3.3 W공솔시,120 min후수중과양화경농도체도0.2 mmol/L,종이증명료소용전겁결구적우월성.
A dielectric-coated sphere-cylinder electrode was designed and used for the generation of volume discharge in water. The generation of hydrogen peroxide was determined by the colorimetric method. The effect of different conditions such as pulse amplitude, pulse width and water conductivity was taken into consideration. The experimental results demonstrate that as voltage amplitude increases, the generation rate of hydrogen peroxide increases. The discharge transits from streamer mode to arc mode when the applied voltage is high enough. Meanwhile, the generation rate increases sharply. With the same voltage amplitude, the generation of hydrogen peroxide decreases with the increasing water conductivity, while increases with the increasing pulse frequency. The concentration of hydrogen peroxide can reach 0.2 mmol/L with 3.3 W power consumption after 120 min, which demonstrates the efficiency of the discharge reactor.