水中脉冲放电产生过氧化氢及其影响因素  

Generation of hydrogen peroxide by pulse discharge in water and its affecting factors

作　　者：朱太云[1] 张乔根[1] 杨兰均[1] 贾江波[2] 

机构地区：[1]西安交通大学电气工程学院,西安710049 [2]中国电力工程顾问集团公司,北京100120

出　　处：《强激光与粒子束》2010年第3期675-678,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(50577053)

摘　　要：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。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.

关 键 词：水中放电 介质涂覆 脉冲功率 过氧化氢 

分 类 号：TM89[电气工程—高电压与绝缘技术]