多针-板脉冲放电气液混合反应器气液中活性物质的生成和转移特性  

Generation and Transfer Characteristics of Active Substances Produced by Pulse Discharge in Multi-needle Gas-liquid Mixing Reactor

作　　者：孙冰[1] 高志鹰[1] 内爱[1] 朱小梅[1] 严志宇[1] 宋艳静[1] 

机构地区：[1]大连海事大学环境科学与工程学院,大连116026

出　　处：《高电压技术》2013年第1期109-116,共8页High Voltage Engineering

基　　金：国家自然科学基金(10875019;41005079);中央高校基础科研业务费专项资金([2012]TD010);国家海洋局海洋溢油鉴别与损害评估技术重点实验室开放基金([2011]10)~~

摘　　要：为了研究脉冲放电条件下气液混合反应器两相中活性物质的生成和转移特性,采用多针对板混合反应器,通过发射光谱测定不同背景气体下放电过程中气液界面产生的羟基自由基(·OH)、氢自由基(·H)、氧自由基(·O)的变化规律,通过化学方法研究了液相中活性物质过氧化氢(H2O2)和臭氧(O3)形成的特性规律,以及脉冲峰值电压、处理时间和溶液pH对H2O2和O3形成的影响,分析了气液两相活性物质的转移过程机理。结果表明:在低电压条件下,利用多针对板混合反应器可以实现更多通道的均匀放电,使活性物质的产量大量增加;随着脉冲峰值电压的升高、处理时间的加长和溶液pH值的增加,H2O2和O3的质量浓度随之升高;对液相中H2O2和O3的质量浓度的影响程度从大到小的气体依次是氧气、空气、氩气、氮气。To investigate the generation and transfer characteristics of two-phase active substances produced by pulse discharge in a multi-needle plate gas-liquid mixing reactors,we studied the movement rules of · OH,· H,· O radicals generated in the gas-liquid interface under different background gas conditions by emission spectrum.Meanwhile,we also studied the generation characteristic rules of the production of H2O2 and O3 in liquid phase and the effects of pulse peak voltage,discharge time,solution pH on the production through chemical methods.Consequently,we obtained the transfer mechanisms of active substances in gas-liquid phase.The results showed that,under a low applied voltage,the production of active substances significantly increased by the multi-needle plate reactor due to uniform discharge in more channels.Moreover,the concentration of H2O2 and O3 increased with pulse peak voltage,discharge time and solution pH,and it was affected by different background gases in a significance order of oxygenairargonnitrogen.

关 键 词：多针混合反应器 气液混合放电 活性物质 发射光谱 过氧化氢(H2O2) 臭氧(O3) 

分 类 号：X703[环境科学与工程—环境工程]