Study on high concentration ozonizer using barrier discharges of rare gas -oxygen mixture

实验研究了氧-稀有气体混合物和纯氧在大气介质阻挡放电中臭氧的产生效率，并利用一维流体模型研究了这些放电的放电特性。采用60hz电源，研究了不同放电间隙下臭氧产生效率与稀有气体含量的关系。当放电间隙小于1.0 mm时，效率随气体含量的增加而降低，而当放电间隙为3 mm时，效率随气体含量的增加而增加，直至气体含量达到80%。在含氧量为80%时，Ne与纯氧的效率之比分别为1.4和1.1。采用时调电源研究了平面盘式阻挡放电的臭氧产生效率。使用时调制电源测量的效率，是注入到d…更多放电的功率的减小函数，高于使用连续电源测量的效率。波浪电源。效率最大提高20%左右。采用一维流体模型研究了氧加入对高压Xe介质阻挡放电性能的影响。随着氧含量的增加，半周期放电电流波形由尖锐的浅脉冲变为只有尖锐的电流脉冲。放电间隙内的电负性随氧含量的变化而发生时空变化。虽然氧的加入较少，但主要的正负电荷由Xe^+_2离子和电子转变为O^+_2和O^-离子。建立了常压下低频氧障放电的一维自洽流体模型，研究了放电结构。模式1结果表明，放电类型可能是多重Townsend-like，因为带电物质密度最大值小于10^<10> cm^<-3>。将计算的臭氧产生效率与实验结果进行了比较，结果吻合较好。少

Ozone production efficiency in atmospheric dielectric barrier discharges of oxygen-rare gas mixture and pure oxygen was experimentally investigated, and the discharge properties of these discharges were also investigated using one-dimensional fluid model.The rare-gas-content dependence of ozone production efficiency for various discharge gaps was investigated using a 60 Hz power source. The efficiency measured for the discharge gap shorter than 1.0 mm decreased with the increase in rare-gas content, while the efficiencies in the cases of Ne and Ar Mixtures for the gap of 3 mm increased with the content until the content reached 80%. The ratios of the efficiency at 80% content to that at pure oxygen were 1.4 for Ne and 1.1 for Ar.The ozone production efficiency was investigated in a planar disk type barrier discharge of oxygen using a time-modulated power supply. The efficiency measured using the time-modulated power supply, which was a decrease function of the power injected into the d … More ischarge, was higher than that measured using a continuous. wave power supply. The maximum improvement of the efficiency reached about 20%.The influence of oxygen addition on discharge properties of high-pressure Xe dielectric barrier discharges was investigated using a one-dimensional fluid model. With the increase in the oxygen content, the waveform of the discharge current during a half cycle was changed from sharp and shallow pulses to only a sharp current pulse. The electronegativity in a discharge gap, which depends on the oxygen content, was varied spatially and temporally. despite of small addition of oxygen, dominant positive and negative charged species were change from Xe^+_2 ions and electrons to O^+_2 and O^-ions.A self-consistent one-dimensional fluid model of low-frequency oxygen barrier discharges at atmosphereic pressure was developed to investigate the discharge structure. Mode 1 results indicated that the type of the discharges may be multiple Townsend-like, because the maximum of the charged species density is lower than 10^<10> cm^<-3>. The calculated ozone production efficiency was compared with the experiment, showing the reasonable agreement. Less