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Mathematical modeling of the kinetics of phenol electrocatalytic hydrogenation over supported Pd–alumina catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
43322 45964 2008 15 PDF Available
Title
Mathematical modeling of the kinetics of phenol electrocatalytic hydrogenation over supported Pd–alumina catalyst
Abstract

A mathematical model of the electrocatalytic hydrogenation of phenol on a Pd/Al2O3 (10%, w/w) catalyst is developed and presented from the chemical kinetic to the fluid mechanical point of view in a laboratory scale cell. The model includes the heterogenous electrochemical steps at the microscopic scale, integrated in a full transient, three-dimensional representation of the fluid mechanics and species concentration in the electrochemical cell. In this reactor, the catalytic particles are dispersed and recirculated in the solution. The brief contact of the powder with a porous reticulated vitreous carbon is sufficient to obtain adsorbed hydrogen on the nanoaggregates who contains the phenol adsorbed. The isotherm of Langmuir and the pseudo-second-order model, based on assumption of second-order mechanism are developed. The aim of this work is to understand and validate the pseudo-second-order adsorption model when used with hydrogen adsorption isotherm, and to develop a full model of the electrochemical cell. The proposed model could be used to improve the design of industrial scale reactors. The model is validated using experimental results from [A. Bannari, C. Cirtiu, F. Kerdouss, P. Proulx, H. Ménard, Chem. Eng. Process. 45 (2006) 471].

Graphical abstractA mathematical model of the electrocatalytic hydrogenation of phenol on a Pd/Al2O3(10%, w/w) catalyst is developed from the chemical kinetic to the fluid mechanical point of view in a laboratory scale cell. The model includes the heterogenous electrochemical steps at the microscopic scale, in a full transient representation of the fluid mechanics in the cell. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Kinetic; Adsorption; Langmuir isotherm; Hydrogen adsorption isotherm; Pseudo-second-order model; Catalysis; Electrocatalytic hydrogenation (ECH); Computational fluid dynamics (CFD); Porous media; Multiphase flow
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Mathematical modeling of the kinetics of phenol electrocatalytic hydrogenation over supported Pd–alumina catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 345, Issue 1, 31 July 2008, Pages 28–42
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
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