Determination of the possibility of using cold plasma for the oxidation of atmospheric nitrogen into nitrogen oxides and the influence of activating substances on the process
DOI:
https://doi.org/10.33216/1998-7927-2025-291-5-74-87Keywords:
molecular nitrogen, direct oxidation, cold plasma, nitrogen oxides, laser matron, hydrogen peroxideAbstract
The object of study is the process of oxidation of atmospheric nitrogen into nitrogen oxides. The oxidation of atmospheric nitrogen to produce nitric acid is important for the development of new methods of atmospheric nitrogen binding and methane activation, which are fundamental problems in the field of chemical science and technology. The process of molecular nitrogen oxidation and the dependence of nitrogen oxides content on the current strength through an installation with an electric arc low-temperature plasma generator were studied.
To confirm the hypothesis, quantum chemical studies of the reaction activity of nitric acid and its decomposition products were carried out. At the initial stage, quantum chemical DFT calculations were performed to determine the electronic structure and thermodynamic parameters of the ground state of nitric acid and its three known isomers.
To implement the process of producing nitric acid from atmospheric air using reproductive technology, a reactor design for the production of nitrogen oxides by direct oxidation of nitrogen in a cold plasma flow was proposed. It was proposed to use the effect of producing nitrogen oxides in an air mixture with nitric acid vapor and during the thermal decomposition of nitric peroxide with atmospheric nitrogen. The efficiency of using cold plasma for the oxidation of atmospheric nitrogen has been established, which is confirmed by the obtained dependences. The influence of the current strength through the installation in the presence of hydrogen peroxide and alcohols as activators of the process of atmospheric nitrogen oxidation in a high-energy environment was revealed. Studies have shown that with an increase in the current through the plant, the amount of nitrogen oxides increases for all activator substances by 2 to 8 times.
The influence of the nitrogen oxides content on the current strength through the installation with an electric arc low-temperature plasma generator was revealed. It is determined that when comparing activating agents that are capable of forming OH radicals during their decomposition, hydrogen peroxide is the most promising activating agent for the process of oxidation of atmospheric nitrogen in a plasma flow.
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