EFFECT OF TEMPERATURE ON BENZENE AND TOLUENE OXIDATION IN A BARRIER DISCHARGE
Abstract
The results on the influence of the temperature of the reactor walls on the direct single-stage oxidation of benzene and toluene in a plasma-chemical reactor with a barrier discharge are presented. The main products of benzene oxidation are phenols and dihydric phenols. During oxidation with toluene, cresols, benzaldehyde and benzyl alcohol are mainly formed. The conducted studies on the influence of the temperature of the reactor walls made it possible to establish the dependence on the main parameters of the oxidation of hydrocarbons in a barrier discharge. The conversion of benzene during oxidation with oxygen increases from 0.2 to 0.4% wt., during oxidation with air it changes from 0.4 to 0.6% wt. with an increase in the temperature of the reactor walls. The conversion of toluene during oxidation with oxygen increases from 1 to 3% wt., during oxidation with air it changes from 0.4 to 0.6% wt. with an increase in the temperature of the reactor walls. It has been established that with an increase in the temperature of the reactor walls in experiments on the oxidation of benzene with air, the content of phenol and pyrocatechol in the mixture practically does not change. An increase in the temperature of the reactor walls in the case of benzene oxidation with air leads to a decrease in the hydroquinone content in the mixture of reaction products, and in the case of benzene oxidation with oxygen, to an increase in the hydroquinone content. In experiments on the oxidation of toluene with air in a barrier discharge, the content of benzyl alcohol and cresols increases, while the content of benzoic aldehyde decreases. During the oxidation of toluene in air, the tendency to increase the content of benzyl alcohol, cresols, and decrease the content of benzyl aldehyde with an increase in the temperature of the reactor walls remains. Comparing our previous results on the oxidative conversion of benzene and the temperature effect in experiments on the oxidation of toluene in a barrier discharge, we can conclude that it is expedient to use temperature to control the process of one-stage oxidation of aromatic hydrocarbons in plasma.
For citation:
Leshchik A.V., Ochered'ko A.N., Ryabov A.Yu., Petrenko T.V., Kudryashov S.V. Effect of temperature on benzene and toluene oxidation in a barrier discharge. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2023. V. 66. N 11. P. 18-24. DOI: 10.6060/ivkkt.20236611.10t.
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