Ozone generation by wire-to-cylinder corona reactor with N2+O2 mixture

The UV-visible spectroscopyin the range from190 to 320 nm wasutilizedtodetectthe ozone formation, in wire-to-cylindercorona reactorwithnegativepolarity. The effectof N2+O2 mixture on ozone production has been investigated. The maximum production of ozone was already corresponding to 70% of oxygen in the gas mixture forany applied voltage from 4,5 to 7 K

Ozone generation in a wire-to-cylinder corona discharge ozonizer fed with mixtures of O2 and N2

The generation of ozone in a coaxial wire-cylinder corona discharge reactor has been experimentally investigated using variable proportions (5% to 90%) of oxygen in nitrogen. The experiments have been carried out under negative polarity and using different gas flow rates (50 cm3/min to 200 cm3/min). The obtained results show that the corona current exhibits a certain dependence with the percentage of oxygen in the gas mixture, which may influence the rate of ozone production. Moreover, the evaluation of the ozone yield has revealed a non-linear dependence of this magnitude with the concentration of oxygen. The maximum ozone yield was obtained when the percentage of oxygen in the gas mixture was about 70%

Two-dimensional modeling of the electrical breakdown in rare gases

In this work a two-dimensional numerical study of dielectric barrier discharge has been proposed in order to understand the breakdown process in rare gases. We used a fluid model which is based on the numerical solution of the two Boltzmann equations (continuity and momentum); these equations are coupled to the Poisson’s equation. This model allowed us to plot the Paschen curve, which represents the breakdown voltage as a function of pressure-distance product. The aim of the study is to optimize the applied voltage and to understand how the discharge geometry and other physical parameters such as the secondary emission coefficient affected the breakdown voltage

Electrical and chemical properties of the

The purpose of this paper is to study, through numerical modeling, the \chem{XeCl} kinetics and the mechanisms affecting plasma uniformity in high-pressure discharge pumped excimer lasers. In the model, the plasma is represented by a resistance inversely proportional to the electron density. Time variation of the electron density is obtained by integrating the transport equations coupled to the heavy-species kinetics and to the external circuit. A detailed description of the \chem{XeCl} molecule and of the associated kinetics has been taken into account, together with the effect of the gas mixture composition on power deposition and the spatial uniformity of the plasma. Calculated discharge current and voltage are compared with experimental results. The obtained results indicate clearly that about 50% of the halogen is consumed at the end of the discharge pulse