Catalytic hydrodeoxygenation. I. Conversions of o-, p-, and m-cresols

Journal Article · Tue Mar 01 04:00:00 EST 1983 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(83)90229-4· OSTI ID:5276480

Odebunmi, E O; Ollis, D F

The hydrodeoxygenation (HDO) of o-, m-, and p-cresols on HDS catalysts (sulfided CoO-MoO/sub 3//..gamma..-Al/sub 2/O/sub 3/) at 225-400/sup 0/C and 68 atm hydrogen gives toluene and methylcyclohexane as the major products on both fresh and aged HDS catalyst. The relative reactivities of the cresols are found to be meta > para > ortho. HDO activity is slowly lost with time, but hydrogenation activity drops more rapidly and is less recoverable with reductive/sulfiding regeneration. As a consequence, the hydrogen consumption per atom of oxygen removed in cresol hydrodeoxygenation declines nearly 50% as the catalyst ages. The fresh catalyst operating at lower temperatures (225-275/sup 0/C) gives primarily a consecutive conversion pattern (cresol..-->..toluene..-->..methylcyclohexane), while the less active aged catalyst used at higher temperatures (350-400/sup 0/C) appears to exhibit a parallel path behavior to toluene and methylcyclohexane from a common surface intermediate. Ring saturation prior to hydrodeoxygenation does not appear to be necessary.

• Research Organization: Univ. of California, Davis
• OSTI ID: 5276480
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 80:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
CATALYSIS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
COBALT COMPOUNDS
COBALT OXIDES
CRESOLS
HEXANE
HYDROCARBONS
HYDROGENATION
HYDROXY COMPOUNDS
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHENOLS
TOLUENE
TRANSITION ELEMENT COMPOUNDS