Influence of oxygen-, nitrogen-, and sulfur-containing compounds on the hydrodeoxygenation of phenols over sulfided CoMo/[gamma]-Al[sub 2]O[sub 3] and NiMo/[gamma]-Al[sub 2]O[sub 3] catalysts

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00023a013· OSTI ID:5745050

Laurent, E; Delmon, B ^[1]

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1. Univ. Catholique de Louvain, Louvain-la-Neuve (Belgium). Unite de Catalyse et Chimie des Materiaux Divises

The hydrodeoxygenation (HDO) of phenols is a key reaction of the hydroprocessing of bio-oils, because phenolic molecules represent an important part of these oils and they are among the most difficult to deoxygenate. This reaction is also a very good reaction test for the characterization of the hydrogenation and hydrogenolysis functions of hydrotreating catalysts. In this work, the influence of competitors on the activity and selectivity of 4-methylphenol HDO over conventional CoMo and NiMo hydrotreating catalysts was evaluated in batch reaction tests. The inhibiting strength followed the order H[sub 2]O << 2-ethylphenol < H[sub 2]S < NH[sub 3]. In all cases, the hydrogenolysis path was more inhibited than the hydrogenation path, indicating a higher adsorption strength and electrophilicity of associated sites. The inhibition was quantified according to a Langmuir adsorption concept. The deviations from this model were attributed to a distribution of the adsorption strength. As opposed to other competitors, hydrogen sulfide slightly promotes the hydrogenation activity of CoMo but not of NiMo. These observations were interpreted as the result of an interconversion of the hydrogenolysis and hydrogenation active sites.

• OSTI ID: 5745050
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 32:11; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090900* -- Biomass Fuels-- Processing-- (1990-)
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
BIOMASS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COBALT
ELEMENTS
ENERGY SOURCES
FUELS
HYDROGENATION
HYDROXY COMPOUNDS
KINETICS
METALS
MOLYBDENUM
NICKEL
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHENOLS
REACTION KINETICS
REDUCTION
RENEWABLE ENERGY SOURCES
SYNTHETIC FUELS
TRANSITION ELEMENTS