Spillover Hydrogen Effect On Amorphous Hydrocracking Catalysts

Stumbo, AM.;Delmon, Bernard;Grange, Paul
(1995) Catalysis Letters — Vol. 31, n° 2-3, p. 173-182 (1995)

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Authors
  • Stumbo, AM.
    Author
  • Delmon, BernardUCLouvain
    Author
  • Grange, PaulUCLouvain
    Author
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 H-2 (or D-2) onto the silica-alumina, with spillover hydrogen forming Bronsted sites and spillover deuterium exchanging with OH.
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Stumbo, AM., Delmon, B., & Grange, P. (1995). Spillover Hydrogen Effect On Amorphous Hydrocracking Catalysts. Catalysis Letters, 31(2-3), 173-182. https://doi.org/10.1007/BF00808831 (Original work published 1995)