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

实验研究了氧气-稀有气体混合气体和纯氧介质阻挡放电产生臭氧的效率，并用一维流体模型研究了这两种放电的放电特性，在60 Hz电源下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。放电间隙小于1.0 mm时的效率随稀有气体含量的增加而降低，而Ne和Ar混合物在间隙为3 mm时的放电效率随稀有气体含量的增加而增加，直至达到80%。当氧气含量为80%时，Ne的效率为1.4，Ar的效率为1.1。采用时间调制电源，研究了平面盘式氧气势垒放电的臭氧产生效率。使用时间调制电源测量的效率，它是注入d…的功率的递减函数更多的电荷量，比用连续体测得的要高。波浪电源。利用一维流体模型研究了氧气添加对高压Xe介质阻挡放电放电特性的影响。随着氧含量的增加，放电电流在半个周期内的波形由尖而浅的脉冲转变为只有尖的电流脉冲。放电间隙中的电负性依赖于氧含量，在空间和时间上都是不同的。尽管氧气的加入量很小，但主要的正负电荷物种从Xe^+2离子和电子转变为O^+2和O^-离子。建立了常压低频氧势垒放电的自洽一维流体模型，研究了放电结构。模式一的结果表明，由于带电物种密度的最大值小于10^&lt；10&gt；-3&gt；，放电类型可能是多个汤森型。将计算的臭氧产生效率与实验结果进行了比较，结果表明两者吻合较好。较少

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