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Sunflower oil hydrogenation mechanisms and kinetics

Albrand, Pierre and Julcour-Lebigue, Carine and Veyrine, Florian and Billet, Anne-Marie Sunflower oil hydrogenation mechanisms and kinetics. (2021) Chemical Engineering Journal, 421 (1). ISSN 1385-8947

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Official URL: https://doi.org/10.1016/j.cej.2021.129854

Abstract

A kinetic model for sunflower oil hydrogenation on a palladium catalyst is proposed based on Horiuty–Polanyi type mechanism and considering either a dissociative or associative adsorption of hydrogen. The derived kinetic laws allow to explain the distinct dependency of saturation and isomerization reactions on hydrogen pressure. Kinetic parameters are identified based on batch slurry hydrogenations carried out at 60–160◦C and 2–31 bar with a powdered Pd/Al2O3 catalyst. A statistical analysis is used to select the most suitable adsorption mechanism for H2. Evaluation of the Weisz–Prater modulus reveals that limitations to intraparticle diffusion occur despite the particle diameter does not exceed 40 μm.

Item Type:Article
HAL Id:hal-03219128
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Funders:
Institut Carnot 3Bcar
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Deposited On:06 May 2021 08:56

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