Kinetics of the solvent-free hydrogenation of 2-methyl-3-butyn-2-ol over a structured Pd-based catalyst

Détails

Ressource 1Télécharger: Crespo-CatTod-2009-AAM.pdf (4488.89 [Ko])
Etat: Public
Version: Author's accepted manuscript
ID Serval
serval:BIB_B4A5DD0D0D8D
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Kinetics of the solvent-free hydrogenation of 2-methyl-3-butyn-2-ol over a structured Pd-based catalyst
Périodique
Catalysis Today
Auteur⸱e⸱s
Crespo-Quesada M., Grasemann M., Semagina N., Renken A., Kiwi-Minsker L.
Statut éditorial
Publié
Date de publication
15/10/2009
Peer-reviewed
Oui
Volume
147
Numéro
3-4
Pages
247-254
Langue
anglais
Résumé
The solvent-free selective hydrogenation of 2-methyl-3-butyn-2-ol (MBY) to 2-methyl-3-buten-2-ol (MBE) was studied over a Pd/ZnO structured catalyst and compared to its behavior in water-assisted conditions. The catalytic behavior was correlated with the surface properties of the catalysts which were characterized by X-ray diffraction and X-ray photoelectron spectroscopy. The catalyst showed high selectivity and stability with the performance being superior to that of the industrial Lindlar catalyst (50%). The addition of a sulphur-containing modifier in the reaction mixture was found to affect the activity and to hinder the over-hydrogenation reaction. The MBE yield of ∼97% was attained at MBY conversion >99%. The reuse of the catalyst showed that it deactivated by a 38% and that its selectivity slightly increased (∼0.5%) over 10 runs. The reaction kinetics was modeled using a Langmuir–Hinshelwood mechanism considering competitive adsorption for the organic species and dissociative adsorption for hydrogen. The kinetic experiments were planned and the results analyzed following a design of experiments (DOE) methodology. This approach led not only to a robust model that predicts the reaction rate in a wide range of reaction conditions but also to the determination of its kinetic parameters.
Mots-clé
HydrogenationKinetics modelingPalladiumStructured catalystDesign of experiments2-Methyl-3-butyn-2-ol
Création de la notice
12/12/2017 15:49
Dernière modification de la notice
20/08/2019 16:23
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