Abstract The applicability of high voltage electrical discharge to reform Carbon Dioxide (CO2) as an environmental pollutant is a technique extensively proved. By this motive, the study of plasma with pure CO2 or its mixtures with other gases is the current interest. In this work, the physical and technical characteristics of a positive direct-current plasma discharge of an Ar/CO2 mixture in a point-to-plate reactor is experimentally and numerically analyzed, and its dependence on Ar fraction studied. Through the optical emission spectroscopy method, the experiments are performed to analyze the emitted spectra from the plasma discharge of the Ar/CO2 mixture. The rotation, vibration, and excitation temperatures and the electron density are also obtained. It was found that all the temperatures decrease as the argon ratio in the Ar/CO2 mixtures increases. Besides, using a 2D PIC-MCC method, the density of three charged species and excitation temperatures are spatially and temporally computed. At the study conditions, a relatively good experimental/modeling agreement is observed for the density and temperature of electrons. Also, the spatial and temporal variations of electric potential and total current density in the discharge medium are numerically calculated by this model, allow us to know the electric characteristic of the discharge.

中文翻译：

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常压点对平面反应器中 Ar/CO2 等离子体的数值和实验研究

摘要 高压放电改造作为环境污染物的二氧化碳 (CO2) 的适用性是一项被广泛证明的技术。由于这个动机，研究具有纯 CO2 或其与其他气体混合物的等离子体是当前的兴趣所在。在这项工作中，通过实验和数值分析了点对板反应器中 Ar/CO2 混合物的正直流等离子体放电的物理和技术特性，并研究了其对 Ar 分数的依赖性。通过光学发射光谱法，进行实验以分析来自 Ar/CO2 混合物的等离子体放电的发射光谱。还获得了旋转、振动和激发温度以及电子密度。发现所有温度随着 Ar/CO2 混合物中氩气比的增加而降低。此外，使用 2D PIC-MCC 方法，可以在空间和时间上计算三种带电物质的密度和激发温度。在研究条件下，观察到电子密度和温度的相对较好的实验/建模一致性。此外，该模型还数值计算了放电介质中电势和总电流密度的时空变化，使我们能够了解放电的电气特性。对于电子的密度和温度，观察到相对较好的实验/建模一致性。此外，该模型还数值计算了放电介质中电势和总电流密度的时空变化，使我们能够了解放电的电气特性。对于电子的密度和温度，观察到相对较好的实验/建模一致性。此外，该模型还数值计算了放电介质中电势和总电流密度的时空变化，使我们能够了解放电的电气特性。