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Spillover hydrogen effect on amorphous hydrocracking catalysts

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Abstract

This work is a contribution to the understanding of the effect of spillover hydrogen in hydrotreating catalysts. Mixtures of sulfided CoMo/SiO2 and an amorphous silica-alumina were studied. The hydrocracking of diphenylmethane was used as a test reaction. The addition of CoMo/SiO2 to silica-alumina strongly increases the hydrocracking rate (by a factor between 4.5 and 8) and the OH-OD exchange (by a factor between 2.5 and 10 after a 20 h experiment). This is interpreted by the spillover of dissociated H2 (or D2) onto the silica-alumina, with spillover hydrogen forming Brønsted sites and spillover deuterium exchanging with OH.

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Authors and Affiliations

  1. Unité de Catalyse et Chimie des Matériaux Divisés, Université Catholique de Louvain, Place Croix du Sud 2/Bte 17, B-1348, Louvainla-Neuve, Belgium

    A. M. Stumbo, P. Grange & B. Delmon

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  1. A. M. Stumbo
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  2. P. Grange
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  3. B. Delmon
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Stumbo, A.M., Grange, P. & Delmon, B. Spillover hydrogen effect on amorphous hydrocracking catalysts. Catal Lett 31, 173–182 (1995). https://doi.org/10.1007/BF00808831

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  • DOI: https://doi.org/10.1007/BF00808831

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