A kinetic analysis methodology to elucidate the roles of metal, support and solvent for the hydrogenation of 4-phenyl-2-butanone over Pt/TiO2

作者：Wilkinson S K^*; McManus I; Daly H; Thompson J M; Hardacre C; Bonab N Sedaie; ten Dam J; Simmons M J H; D'Agostino C; McGregor J; Gladden L F; Stitt E H

来源：Journal of Catalysis, 2015, 330: 362-373.

DOI：10.1016/j.jcat.2015.06.007

• Selective hydrogenation
• Solvent effect
• Kinetic modelling
• Aromatic ketone
• Pt
• Titania

The rate and, more importantly, selectivity (ketone vs aromatic ring) of the hydrogenation of 4-phenyl-2-butanone over a Pt/TiO2 catalyst have been shown to vary with solvent. In this study, a fundamental kinetic model for this multi-phase reaction has been developed incorporating statistical analysis methods to strengthen the foundations of mechanistically sound kinetic models.
A 2-site model was determined to be most appropriate, describing aromatic hydrogenation (postulated to be over a platinum site) and ketone hydrogenation (postulated to be 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. The kinetic analysis method shown has demonstrated the role of solvents in influencing reactant adsorption and reaction selectivity.

• 出版日期2015-10