Binuclear Dioxomolybdenum(VI) Complex Based on Bis(2-pyridinecarboxamide) Ligand as Effective Catalyst for Fuel Desulfurization

A binuclear dioxomolybdenum catalyst [(MoO2Cl2)2(L)] (1) (with L (1S,2S)-N,N′-bis(2-pyridinecarboxamide)-1,2-cyclohexane) was prepared and used as catalyst for the desulfurization of a multicomponent model fuel containing the most refractory sulfur compounds in real fuels. This complex was shown to...

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Bibliographic Details
Published in:Catalysts 2024-05, Vol.14 (5), p.305
Main Authors: Mirante, Fátima, Dias, Catarina N., Silva, André, Gago, Sandra, Balula, Salete S.
Format: Article
Language:English
Subjects:
Aromatic compounds
Benzothiophene
Catalysts
Catalytic oxidation
Cyclohexane
Desulfurizing
diesel
Diesel fuels
dioxomolybdenum complex
Efficiency
Emissions
Energy consumption
Fuels
Hydrogen peroxide
Ligands
Molybdenum
multicomponent model fuel
Oxidation
oxidative desulfurization
Polyethylene glycol
Solvents
Sulfur compounds
Sulfur content
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Summary:A binuclear dioxomolybdenum catalyst [(MoO2Cl2)2(L)] (1) (with L (1S,2S)-N,N′-bis(2-pyridinecarboxamide)-1,2-cyclohexane) was prepared and used as catalyst for the desulfurization of a multicomponent model fuel containing the most refractory sulfur compounds in real fuels. This complex was shown to have a high efficiency to oxidize the aromatic benzothiophene derivative compounds present in fuels, mainly using a biphasic 1:1 model fuel/MeOH system. This process conciliates catalytic oxidative and extractive desulfurization, resulting in the oxidation of the sulfur compounds in the polar organic solvent. The oxidative catalytic performance of (1) was shown to be influenced by the presence of water in the system. Using 50% aq. H2O2, it was possible to reuse the catalyst and the extraction solvent, MeOH, during ten consecutive cycles without loss of desulfurization efficiency.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal14050305