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Spillover Hydrogen Effect On Amorphous Hydrocracking Catalysts

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Stumbo, AM. Delmon, Bernard [UCL] Grange, Paul [UCL]

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.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 1995
Language Anglais
Journal information "Catalysis Letters" - Vol. 31, no. 2-3, p. 173-182 (1995)
Peer reviewed yes
Publisher Baltzer Sci Publ Bv (Amsterdam)
issn 1011-372X
e-issn 1572-879X
Publication status Publié
Affiliation UCL
Keywords SPILLOVER (HYDROGEN) ; AMORPHOUS SILICA-ALUMINA (ACIDITY) ; MECHANICAL MIXTURES ; HYDROCRACKING ; ISOTOPIC EXCHANGE
Links
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Bibliographic reference Stumbo, AM. ; Delmon, Bernard ; Grange, Paul. Spillover Hydrogen Effect On Amorphous Hydrocracking Catalysts. In: Catalysis Letters, Vol. 31, no. 2-3, p. 173-182 (1995)
Permanent URL http://hdl.handle.net/2078.1/48168