Effect of solvent on the hydrogenation of 4-phenyl-2-butanone over Pt based catalysts
Sedaie, Bonab N
ten, Dam J
Journal of Catalysis
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McManus, J., Daly, H., Thompson, J., Connor, E., Hardacre, C., Wilkinson, S., Sedaie, B. N., et al. (2015). Effect of solvent on the hydrogenation of 4-phenyl-2-butanone over Pt based catalysts. Journal of Catalysis, 330 344-353. https://doi.org/10.1016/j.jcat.2015.06.008
In part I of this study, experimental data were presented for the hydrogenation of 4-phenyl-2-butanone with a 4% Pt/TiO2 catalyst where the reaction rate and selectivity (ketone vs. aromatic ring) varied with solvent. In this paper, a rigorous kinetic model is presented utilising these data, incorporating statistical analysis methods to strengthen the foundations of mechanistically sound kinetic models. A fundamental kinetic model for the system is presented and a 2-site model was determined to be most appropriate, describing aromatic hydrogenation (postulated to be over a platinum site) and ketone hydrogenation (at the platinum titania interface). Solvent choice has little impact on the ketone hydrogenation rate constant but strongly impacts aromatic hydrogenation due to solvent-catalyst interaction. Reaction selectivity is also correlated to a fitted product adsorption constant parameter. This kinetic analysis method is the first of its kind demonstrating the role of solvents in influencing reactant adsorption and reaction selectivity.
Selective hydrogenation, Solvent effect, Aromatic ketone, Pt, Titania
We acknowledge EPSRC for funding as part of the CASTech grant (EP/G011397/1) and the Department of Employment and Learning for a studentship (IM). NSB was funded by a PhD scholarship from the University of Birmingham. SKW was supported by an Engineering Doctorate Studentship in Formulation Engineering at the University of Birmingham sponsored by the EPSRC (EP/G036713/1) and Johnson Matthey.
External DOI: https://doi.org/10.1016/j.jcat.2015.06.008
This record's URL: https://www.repository.cam.ac.uk/handle/1810/250518
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