Activity of mo(w)s-2/sba-15 catalysts synthesized from simow heteropoly acids in 4,6-dimethyldibenzothiophene hydrodesulfurization - Université de Lille Accéder directement au contenu
Article Dans Une Revue Neftekhimiya / Petroleum Chemistry Année : 2019

Activity of mo(w)s-2/sba-15 catalysts synthesized from simow heteropoly acids in 4,6-dimethyldibenzothiophene hydrodesulfurization

Résumé

Mo(W)/SBA-15 catalysts are prepared using heteropoly acids H4SiMo12O40, H4SiW12O40, and H4SiMo3W9O40. The catalysts in the sulfide form are studied by low-temperature nitrogen adsorption, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy. Catalytic properties are tested in the hydrodesulfurization of 4,6-dimethyldibenzothiophene. It is shown that the gas-phase sulfiding of Mo(W)/SBA-15 catalysts leads to increase in the average length of particles and the number of Mo(W)S2 layers in active phase particles compared with liquid-phase sulfiding with the use of dimethyl sulfide. The replacement of a quarter of tungsten atoms with molybdenum ones makes it possible to considerably improve the catalytic activity of the mixed catalyst Mo + W/SBA-15 compared with the monometallic counterparts. This effect can be enhanced due to the use of mixed heteropoly acid H4SiMo3W9O40 as a precursor of the active phase of the MoW/SBA-15 catalyst, which is apparently associated with the formation of MoWS2 active sites.

Domaines

Catalyse
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Dates et versions

hal-04396740 , version 1 (20-02-2024)

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Aleksandr Kokliukhin, M. S. Nikul'Shina, A. A. Sheldaisov-Meshcheryakov, A. V. Mozhaev, Christine Lancelot, et al.. Activity of mo(w)s-2/sba-15 catalysts synthesized from simow heteropoly acids in 4,6-dimethyldibenzothiophene hydrodesulfurization. Neftekhimiya / Petroleum Chemistry, 2019, Neftekhimiya / Petroleum Chemistry, 59, pp.1293-1299. ⟨10.1134/S0965544119120077⟩. ⟨hal-04396740⟩
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