Bimetallic Heterogeneous Catalysts for the Oxidation of Sulfur-Containing Compounds with Hydrogen Peroxide

Bimetallic heterogeneous catalysts based on SBA-15 containing molybdenum and iron oxides were studied in the oxidation reactions of model mixtures of organosulfur compounds. The addition of iron (in the form of iron(III) oxide) in an amount of 0.05 wt % to the catalyst 5% Mo/SBA-15 was the most effe...

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Bibliographic Details
Published in:Kinetics and catalysis 2023-10, Vol.64 (5), p.627-634
Main Authors: Gul, O. O., Polikarpova, P. D., Akopyan, A. V., Anisimov, A. V.
Format: Article
Language:English
Subjects:
Bimetals
Catalysis
Catalysts
Chemistry
Chemistry and Materials Science
Conversion
Dibenzothiophene
Hydrogen peroxide
Iron oxides
Low temperature
Mixtures
Molybdenum
Organosulfur compounds
Oxidation
Oxidizing agents
Photoelectrons
Physical Chemistry
Substrates
Sulfur compounds
X ray photoelectron spectroscopy
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Summary:Bimetallic heterogeneous catalysts based on SBA-15 containing molybdenum and iron oxides were studied in the oxidation reactions of model mixtures of organosulfur compounds. The addition of iron (in the form of iron(III) oxide) in an amount of 0.05 wt % to the catalyst 5% Mo/SBA-15 was the most effective. The catalysts were characterized by a complex of physicochemical methods: low-temperature adsorption–desorption of nitrogen, X-ray diffraction analysis, transmission electron microscopy, and X-ray photoelectron spectroscopy. The influence of the main oxidation parameters (reaction time, temperature, composition and amount of catalyst, and amount of oxidizing agent) on the conversion of dibenzothiophene as a component of the model mixture was investigated. Optimal oxidation conditions were selected to achieve the total conversion of the substrate: the molar ratio H 2 O 2 : S = 2 : 1, 0.5 wt % FeMo/SBA-15 catalyst, 60 min, and 60°C. Catalysts can be used for at least five cycles without loss of activity during their intermediate washing from oxidation products.
ISSN:0023-1584
1608-3210
DOI:10.1134/S0023158423050038