Hydroprocessing of substituted benzenes over a sulfided CoO-MoO sub 3 /. gamma. -Al sub 2 O sub 3 catalyst

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(90)90298-X· OSTI ID:6219691

Moreau, C; Joffre, J; Saenz, C; Geneste, P ^[1]

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1. Laboratoire de Chimie Organique Physique et Cinetique Chimique Appliquees, Montpellier (France)

The literature data concerning the hydroprocessing of substituted benzenes show that CoMo/Al{sub 2}O{sub 3} and NiMo/Al{sub 2}O{sub 3} catalysts behave differently. For example, the hydrodeoxygenation of methyl-substituted phenols proceeds mainly through hydrogenolysis of the C-O bond over a sulfided CoMo/Al{sub 2}O{sub 3} catalyst and the authors concerned have also proposed that different active sites were responsible for the two reaction paths, one for C-O bond cleavage and another for hydrogenation. Over a sulfided NiMo/Al{sub 2}O{sub 3} catalyst, the authors have shown that the hydrodeoxygenation of phenols substituted by alkyl, cycloalkyl, or phenyl groups occurs mostly through ring hydrogenation. From a recent compilation of results obtained under similar operating conditions in their laboratory for numerous model compounds and those reported in the literature, the authors arrived at the conclusion that the difference between NiMo/Al{sub 2}O{sub 3} and CoMo/Al{sub 2}O{sub 3} catalysts lies in the hydrogenolysis rather than in the hydrogenation properties. It was thus interesting to consider the behavior of a CoMo/Al{sub 2}O{sub 3} catalyst toward a series of X-substituted benzenes as was done with the NiMo/Al{sub 2}O{sub 3} catalyst. This could provide further information concerning the interactions between the catalyst and the organic molecules, the nature of the catalytic sites, and the mechanism of hydrogenation and hydrogenolysis reactions.

• OSTI ID: 6219691
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 122:2; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
BIMETALS
CATALYSIS
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COBALT
COBALT COMPOUNDS
COBALT OXIDES
DEHYDROGENATION
ELEMENTS
HYDROGENATION
HYDROXY COMPOUNDS
KINETICS
METALS
MOLYBDENUM
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MOLYBDENUM OXIDES
NICKEL
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHENOLS
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS