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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Measurement of singlet delta oxygen in an atmospheric-pressure helium-oxygen plasma jet
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Measurement of singlet delta oxygen in an atmospheric-pressure helium-oxygen plasma jet

机译：大气压氦 - 氧等离子体射流中偏出δ氧的测量

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摘要

The density of singlet delta oxygen O-2(a(1)Delta(g)) is measured in situ in a He/O-2 atmospheric-pressure plasma jet using optical emission spectroscopy at 1.27 mu m. A sinusoidal high voltage of 1-10 kHz is applied between two electrodes wrapped around a quartz tube, in which the working gas flows. The two-dimensional distribution of the O-2(a(1)Delta(g)) density shows that O-2(a(1)Delta(g)) is primarily produced in the dielectric barrier discharge inside the quartz tube and that the O-2(a(1)Delta(g)) production in the plasma jet plume is negligibly small. Typically, 100 ppm of O-2(a(1)Delta(g)) is produced. The O-2(a(1)Delta(g)) density increases with O-2 concentration and is proportional to the specific input energy (SIE; J/l) irrespective of the discharge voltage, frequency, and gas flow rate. The O-2(a(1)Delta(g)) production per SIE was 10 ppm/(J/l). The loss processes of O-2(a(1)Delta(g))via reactions with O-3 and O-2 are discussed. The O-2(a(1)Delta(g)) density decreases when the working gas is humidified. An addition of 200 ppm of H2O decreases the O-2(a(1)Delta(g)) density by half.
机译：单次δ氧O-2（A（1）Δ（g））的密度在HE / O-2大气压等离子体射流中原位测量，使用1.27μm的光学发射光谱法测量。在两个电极之间施加1-10kHz的正弦高压，在两个电极围绕石英管，其中工作气流。 O-2的二维分布（A（1）Δ（g））密度表示O-2（A（1）Δ（g））主要在石英管内的介质屏障放电中产生等离子体喷射羽流中的O-2（A（1）Δ（g））可忽略较小。通常，产生100ppm的O-2（A（1）Δ（g））。 O-2（A（1）Δ（g））密度随o-2浓度的增加，与特定输入能量（筛子; j / l）成比例，而不管放电电压，频率和气体流速。每个SIE的O-2（A（1）Δ（g））产生10ppm /（J / L）。讨论了通过与O-3和O-2反应的O-2（A（1）Δ（g））的损失方法。当加湿工作气体时，O-2（A（1）Δ（g））密度降低。添加200ppm的H 2 O将O-2（A（1）Δ（g））的密度降低一半。

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