Tuning Hydrodesulfurization Active-Phase Dispersion using Optimized Mesoporous Titania-Doped Silica Supports

Authors

  • Dr. Minh Tuan Nguyen Dinh,

    1. Unité de Catalyse et Chimie du Solide, UCCS, UMR CNRS 8181, Université Lille Nord de France, 59655 Villeneuve d'Ascq (France), Fax: (+33) 3-20-43-65-61
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  • Dr. Prashant Rajbhandari,

    1. Unité de Catalyse et Chimie du Solide, UCCS, UMR CNRS 8181, Université Lille Nord de France, 59655 Villeneuve d'Ascq (France), Fax: (+33) 3-20-43-65-61
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  • Dr. Christine Lancelot,

    Corresponding author
    1. Unité de Catalyse et Chimie du Solide, UCCS, UMR CNRS 8181, Université Lille Nord de France, 59655 Villeneuve d'Ascq (France), Fax: (+33) 3-20-43-65-61
    • Unité de Catalyse et Chimie du Solide, UCCS, UMR CNRS 8181, Université Lille Nord de France, 59655 Villeneuve d'Ascq (France), Fax: (+33) 3-20-43-65-61

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  • Dr. Pascal Blanchard,

    1. Unité de Catalyse et Chimie du Solide, UCCS, UMR CNRS 8181, Université Lille Nord de France, 59655 Villeneuve d'Ascq (France), Fax: (+33) 3-20-43-65-61
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  • Prof. Carole Lamonier,

    1. Unité de Catalyse et Chimie du Solide, UCCS, UMR CNRS 8181, Université Lille Nord de France, 59655 Villeneuve d'Ascq (France), Fax: (+33) 3-20-43-65-61
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  • Dr. Magali Bonne,

    1. Institut de Science des Matériaux de Mulhouse, IS2 M UMR 7361 CNRS, 3 bis, rue Alfred Werner, 68093 Mulhouse Cedex (France)
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  • Dr. Sébastien Royer,

    1. Université de Poitiers, IC2 MP UMR 7285 CNRS, 4, rue Michel Brunet, 86022 Poitiers Cedex (France)
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  • Prof. Franck Dumeignil,

    1. Unité de Catalyse et Chimie du Solide, UCCS, UMR CNRS 8181, Université Lille Nord de France, 59655 Villeneuve d'Ascq (France), Fax: (+33) 3-20-43-65-61
    2. Institut Universitaire de France, Maison des Universités, 103 Bd Saint-Michel, 75005 Paris (France)
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  • Prof. Edmond Payen

    1. Unité de Catalyse et Chimie du Solide, UCCS, UMR CNRS 8181, Université Lille Nord de France, 59655 Villeneuve d'Ascq (France), Fax: (+33) 3-20-43-65-61
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Abstract

Solids composed of TiO2 nano-crystallites (10–40 wt %) dispersed in an SBA-15 matrix were synthesised and used as hydrodesulfurisation (HDS) active-phase supports. Well-dispersed polymolybdate species were detected by Raman spectroscopy on all the CoMo-based oxidic precursors. Undesirable bulk CoMoO4 mixed oxide was also detected on the surface of low-TiO2-content materials, which suggests the enhancement of the Mo oxidic species dispersion as a result of the presence of TiO2. After activation under H2/H2S, the obtained catalysts were tested in the HDS of thiophene. An optimum conversion was observed for the catalyst supported on the solid that contained 20 wt % TiO2, which outperformed the homologous samples supported on TiO2 and SBA-15. This clearly highlights the beneficial effect of using such nano-TiO2-SBA-15 composite supports, in which SBA-15 confers adequate textural properties to the system, and the active phase benefits from the dispersive effect of TiO2.

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