Influence of UV Radiation on the Process of Noncatalytic Oxidation of Dibenzothiophene in Dibenzothiophensulphone by the Oxygen in Air

Oxidation of dibenzothiophene (DBT) is used as the model reaction in studying the process of catalytic oxidative desulfurization of diesel fuel. The method of oxidative desulfurization includes the stage of oxidation of thiophene compounds contained in the fuel into the corresponding thiophenesulfon...

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Bibliographic Details
Published in:Russian journal of physical chemistry. B 2021, Vol.15 (1), p.153-155
Main Authors: Korchak, V. N., Bykhovsky, M. Ya, Romanov, A. N., Silchenkova, O. N.
Format: Article
Language:English
Subjects:
Benzaldehyde
Chemical Physics of Ecological Processes
Chemistry
Chemistry and Materials Science
Desulfurizing
Dibenzothiophene
Diesel fuels
Irradiation
Oxidation
Physical Chemistry
Room temperature
Ultraviolet radiation
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Summary:Oxidation of dibenzothiophene (DBT) is used as the model reaction in studying the process of catalytic oxidative desulfurization of diesel fuel. The method of oxidative desulfurization includes the stage of oxidation of thiophene compounds contained in the fuel into the corresponding thiophenesulfones, followed by their extraction from the reaction mixture with a polar liquid. In this paper, we study the oxidation reaction of DBT into DBT sulfone in a solution in octane, with atmospheric oxygen in the presence of benzaldehyde at room temperature and irradiation of the reaction mixture with ultraviolet (UV) light. It is shown that in this case a DBT conversion of 97 to 98% can be achieved without using a catalyst. It is also found that UV irradiation of the reaction mixture can be carried out periodically (in pulses of a duration of 1 min), which makes it possible to exclude overhearing reaction mixture.
ISSN:1990-7931
1990-7923
DOI:10.1134/S1990793121010061