Kinetics of the propene oxidation over a Pt/alumina catalyst

• Kinetic study of propene oxidation on a Pt/Al2O3 catalyst.
• Propene presented an inhibitory effect on the reaction whereas oxygen promoted it.
• Langmuir–Hinshelwood model as the best rate model in fitting the experimental data.
• Adsorption constants confirmed that oxygen was more weakly adsorbed on the catalyst.

This article reports the results obtained during the kinetic study of propene total oxidation on a platinum alumina catalyst in excess of oxygen. Reaction partial orders of propene and oxygen exhibited values of about − 0.5 and + 1, respectively. Propene presented a great inhibitory effect whereas an increase of oxygen concentration promoted the reaction. Based on TPD results, a Langmuir–Hinshelwood LH model considering propene to be adsorbed without dissociation was raised. A good agreement between experimental data and predicted results was observed. The value of the adsorption constants obtained confirmed that oxygen was more weakly adsorbed on the catalyst than propene.

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