The influence of liquid conductivity on electrical breakdown and hydrogen peroxide production in a nanosecond pulsed plasma discharge generated in a water-film plasma reactor
The influence of liquid conductivity on electrical breakdown and hydrogen peroxide production in a nanosecond pulsed plasma discharge generated in a water-film plasma reactor
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DOI：
10.1088/1361-6463/aaf132
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发表时间：
2018-12
期刊：
影响因子：
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通讯作者：
Huihui Wang;R. Wandell;K. Tachibana;J. Voráč;B. Locke
中科院分区：
文献类型：
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作者：
Huihui Wang;R. Wandell;K. Tachibana;J. Voráč;B. Locke
通过在去离子 (DI) 水中添加 KCl 并使用氦气和氩气作为载气，在 0.01 mS cm−1 至 36 mS cm−1 的液体电导率范围内研究液体电导率对水膜等离子体反应器中产生的纳秒脉冲丝状放电中电击穿和过氧化氢 (H2O2) 产生的影响。确定了不同液体电导率下的等离子体特性，包括电子密度、气体温度和等离子体体积、H2O2 生成速率和能量产率以及液体中的能量耗散。随着液体电导率的增加，散装液体中的能量耗散增加，导致总输入能量增加，导致 H2O2 能量产量略有下降。此外，对于氦等离子体，H2O2 的生成率并没有随电导率发生显着变化，但在氩等离子体中，H2O2 的生成率下降了约 13%。氦等离子体中沉积的能量不随电导率变化，从而导致基于等离子体中的能量的H2O2能量产量随电导率恒定。基于电路的模型用于预测高达 36 mS cm−1 的液体电导率范围的击穿电压。该模型还表明，减少所施加电压的上升时间（即更快的上升速率）会显着增加击穿电压，从而提高等离子体系统的液体电导率耐受性，使其能够在接近海水电导率的情况下运行。
The influence of liquid conductivity on electrical breakdown and hydrogen peroxide (H2O2) production in a nanosecond pulsed filamentary discharge generated in a water film plasma reactor was investigated over the liquid conductivity range from 0.01 mS cm−1 to 36 mS cm−1 by adding KCl to deionized (DI) water and using helium and argon as carrier gases. The plasma properties, including electron density, gas temperature, and plasma volume, the H2O2 production rate and energy yield, and the energy dissipation into the liquid were determined at different liquid conductivity. The energy dissipation into the bulk liquid increased as the liquid conductivity increased causing the total input energy to increase and resulting in a small decrease in H2O2 energy yield. In addition, the production rate of H2O2 did not change significantly with conductivity for the helium plasma but decreased about 13 percent in the argon plasma. The energy deposited in the helium plasma did not change with conductivity, thereby causing the H2O2 energy yield based upon energy in the plasma to be constant with conductivity. A model based upon the electrical circuit was used to predict the breakdown voltage for a range of liquid conductivity up to 36 mS cm−1. This model also showed that decreasing the rise time of the applied voltage (i.e. faster rising rate) significantly increased the breakdown voltage, and therefore improved the liquid conductivity tolerance of the plasma system allowing it to function at near sea-water conductivity.