Catalytic performance of vanadium-substituted molybdophosphoric acid supported on zirconium modified mesoporous silica in oxidative desulfurization

•Immobilization of H4[PMo11VO40] on zirconium modified mesoporous silica SBA-15 was performed.•Catalytic behavior of sample for oxidation of dibenzothiophene was investigated.•Sample showed the high sulfone adsorption ability as a complementary step. 11-Molybdo-vanadophosphoric acid supported on zir...

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Bibliographic Details
Published in:Chemical engineering research & design 2015-02, Vol.94, p.565-572
Main Authors: Chamack, M., Mahjoub, A.R., Aghayan, H.
Format: Article
Language:English
Subjects:
Adsorption
Catalyst
Catalysts
Desulfurizing
Diffraction
Dissolution
Filtration
Heteropoly acid
Mesoporous silica
Oxidative desulfurization
Scanning electron microscopy
Silicon dioxide
Zirconium
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Summary:•Immobilization of H4[PMo11VO40] on zirconium modified mesoporous silica SBA-15 was performed.•Catalytic behavior of sample for oxidation of dibenzothiophene was investigated.•Sample showed the high sulfone adsorption ability as a complementary step. 11-Molybdo-vanadophosphoric acid supported on zirconium modified mesoporous silica (SBA-15) material was synthesized and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, Raman spectroscopy, and N2 physical adsorption–desorption (BET) techniques. Under mild reaction conditions, the mentioned material exhibited high catalytic activity and reusability in oxidative desulfurization (ODS) reaction of model oil which was prepared by dissolving dibenzothiophene (DBT) in n-hexane. FT-IR and mass analysis showed that the main product of the DBT oxidation is its corresponding sulfone, which was adsorbed on the surfaces of zirconium-coated SBA-15. Therefore the desulfurization of the model oil was completed by filtration of the catalyst solid phase from the liquid phase. An empirical kinetic model was used to fit the rate data. The activation energy was found to be 15.92kJ/mol.
ISSN:0263-8762
1744-3563
DOI:10.1016/j.cherd.2014.09.017