Highly active bulk mo(w)s-2 hydrotreating catalysts synthesized by etching out of the carrier from supported mono- and bimetallic sulfides - Université de Lille Accéder directement au contenu
Article Dans Une Revue Neftekhimiya / Petroleum Chemistry Année : 2020

Highly active bulk mo(w)s-2 hydrotreating catalysts synthesized by etching out of the carrier from supported mono- and bimetallic sulfides

Résumé

A bulk MoWS2 catalyst has been synthesized by acid etching of the carrier from the supported MoWS2/Al2O3 catalyst obtained on the basis of the mixed bimetallic heteropoly acid (HPA) H4[SiMo3W9O40]. As reference samples, monometallic MoS2 and WS2 catalysts have been prepared from the corresponding supported analogues, as well as a Mo + WS2 sample based on a mechanical mixture of monometallic HPA in the atomic ratio of Mo/W = 1/3. The catalytic properties of the synthesized catalysts have been studied in model reactions of hydrodesulfurization (HDS) of dibenzthiophene (DBT) and hydrogenation (HYD) of naphthalene in a flow unit. It has been shown that the catalytic activity of the samples in both the DBT HDS and naphthalene HYD reactions increases in the following order: MoS2 < WS2 < Mo + WS2 MoWS2. It has been found that the bulk tungsten-containing catalysts exhibit higher specific catalytic activity than the supported counterparts. Increased values of hydrogen uptake according to the results of hydrogen temperature-programmed reduction for the bulk catalysts indicate an increase in the number of active sites and the formation of a more effective active phase compared to supported catalysts.

Domaines

Catalyse
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Dates et versions

hal-04442534 , version 1 (06-02-2024)

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Citer

A. S. Koklyukhin, A. V. Mozhaev, M. S. Nikul'Shina, Christine Lancelot, Pascal Blanchard, et al.. Highly active bulk mo(w)s-2 hydrotreating catalysts synthesized by etching out of the carrier from supported mono- and bimetallic sulfides. Neftekhimiya / Petroleum Chemistry, 2020, Neftekhimiya / Petroleum Chemistry, 59, pp.S53-S59. ⟨10.1134/S0965544119130085⟩. ⟨hal-04442534⟩
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