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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >The role of water and oxygen impurities on ozone production in a negative corona discharge of CO2
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The role of water and oxygen impurities on ozone production in a negative corona discharge of CO2

机译：水和氧气杂质在负电晕CO2放电中对臭氧产生的作用

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摘要

The production of ozone in a negative corona discharge fed by carbon dioxide with embedded traces of oxygen and water has been studied. The presence of traces of oxygen in both pure and dry CO2 leads to an increase in nascent ozone concentrations. In contrast, traces of water vapour (0-800 ppm) are shown to rapidly suppress ozone concentrations with the largest decreases being observed at lowest gas pressures in the discharge (300 Torr). The presence of water vapour did not considerably affect the electrical properties of negative dc corona suggesting that a chemical process is responsible for the ozone loss. We have shown that the addition of water up to a concentration of 1500 ppm has only a marginal effect on the processes of ozone formation but the catalytic cycle of ozone destruction involving OH radicals can be the reason for observed decrease in the total ozone concentration with increasing water concentration.
机译：已经研究了二氧化碳在负电晕放电中产生的臭氧，其中嵌入了氧气和水。在纯净的CO2和干燥的CO2中都存在微量的氧气会导致新生臭氧浓度的增加。相反，显示出痕量的水蒸气（0-800 ppm）可以快速抑制臭氧浓度，在排气中的最低气压（300 Torr）处观察到最大的减少量。水蒸气的存在并没有显着影响负直流电晕的电性能，这表明化学过程是造成臭氧损失的原因。我们已经表明，添加至多1500 ppm的水对臭氧形成过程仅具有边际影响，但是涉及到OH自由基的破坏臭氧的催化循环可能是观察到总臭氧浓度随增加而降低的原因。水浓度。

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