Molybdenum-Containing Catalysts Based on Porous Aromatic Frameworks as Catalysts of Oxidation of Sulfur-Containing Compounds

• Published in: Petroleum chemistry Vol. 63; no. 3; pp. 257 - 267
• Main Authors: Akopyan, A. V., Eseva, E. A., Lukashov, M. O., Kulikov, L. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-03-2023; Springer; Springer Nature B.V
• Subjects: Catalysis; Catalysts; Chemistry; Chemistry and Materials Science; Dibenzothiophene; Functional groups; Hydrogen peroxide; Industrial Chemistry/Chemical Engineering; Infrared spectroscopy; Low temperature; Molybdenum; Nitrogen; Oxidation; Oxidation-reduction reaction; Oxidizing agents; Substrates; Sulfur; Sulfur compounds; Thiophene; porous aromatic frameworks; molybdenum-containing catalyst; dibenzothiophene; oxidative desulfurization
• ISSN: 0965-5441; 1555-6239
• DOI: 10.1134/S0965544123010103

New molybdenum-containing catalysts based on PAF-30 mesoporous carbon material for oxidation of sulfur-containing compounds (SCs) in a model fuel were synthesized. The PAF-30 support was modified with functional groups containing a positively charged nitrogen atom with various substituents. The modified supports were studied by the methods of low-temperature nitrogen adsorption/desorption, IR spectroscopy, and elemental analysis. The major factors affecting the oxidation were considered: reaction temperature and time, oxidant amount, catalyst dosage, and kind of sulfur-containing substrate. For the Мо/PAF-30-NEt
3
catalyst, optimum conditions were found for oxidation of various classes of SCs in model mixtures: H
2
O
2
: S molar ratio 6 : 1, 60°С, 60 min. The Мо/PAF-30-NEt
3
catalyst operates in dibenzothiophene (DBT) oxidation during five cycles without appreciable activity loss.