Influence of operational variables on the catalytic behavior of Pt/alumina in the slurry-phase hydrogenation of phenol

Journal Article · Tue Nov 01 04:00:00 EST 1994 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00035a007· OSTI ID:7051432

Gutierrez-Ortiz, M A; Castano, A; Gonzalez-Marcos, M P; Gutierrez-Ortiz, J I; Gonzalez-Velasco, J R ^[1]

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1. Univ. del Pais Vasco/Euskal Herriko Unibertsitatea, Bilbao (Spain). Dept. de Ingenieria Quimica

Hydrogenation of phenol in the liquid phase has been studied. The reaction system was a stirred tank reactor with the catalyst--highly dispersed platinum/[gamma]-alumina prepared by adsorption from an aqueous solution of H[sub 2]PtCl[sub 6]--suspended as a slurry. In order to prevent the mass transport steps to control the reaction rate, several experiments were carried out varying stirring rate, catalyst particle size, and catalyst weight. In the studied conditions, working with stirring rate above 9 Hz, catalyst particle size below 50 [mu]m, and catalyst weight below 0.5 g assured the kinetic regime. The influence of pressure, temperature, and catalyst platinum content on both initial activity and selectivity was analyzed, for the chemically-controlled regime. Increasing total pressure was found to increase activity almost linearly and to decrease selectivity. The apparent activation energies for phenol consumption and cyclohexanone and cyclohexanol formation (from phenol) were determined.

• OSTI ID: 7051432
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 33:11; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

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100200* -- Synthetic Fuels-- Production-- (1990-)
ALCOHOLS
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ALUMINIUM OXIDES
AROMATICS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CYCLOHEXANOL
CYCLOHEXANONE
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