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

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State: Public
Version: Author's accepted manuscript
Serval ID
serval:BIB_B4A5DD0D0D8D
Type
Article: article from journal or magazin.
Collection
Publications
Title
Kinetics of the solvent-free hydrogenation of 2-methyl-3-butyn-2-ol over a structured Pd-based catalyst
Journal
Catalysis Today
Author(s)
Crespo-Quesada M., Grasemann M., Semagina N., Renken A., Kiwi-Minsker L.
Publication state
Published
Issued date
15/10/2009
Peer-reviewed
Oui
Volume
147
Number
3-4
Pages
247-254
Language
english
Abstract
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.
Keywords
HydrogenationKinetics modelingPalladiumStructured catalystDesign of experiments2-Methyl-3-butyn-2-ol
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12/12/2017 15:49
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20/08/2019 16:23
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