Global kinetic modelling of the NH3 oxidation on Fe/BEA zeolite

• We develop a global kinetic model of the NH3 oxidation on Fe/BEA zeolite catalyst.
• The model includes NH3 adsorption/desorption on Lewis acid sites.
• The reaction of chemisorbed NH3 with gaseous O2 is formally described.
• Experimental data are reproduced and predicted by the model.

In the present paper, the kinetics of the NH3 oxidation on Fe/BEA zeolite catalyst was examined representing a side reaction of the selective catalytic reaction of NOx. The kinetic studies were performed in a gradient-free loop reactor between 723 and 773 K varying the concentration of NH3 and O2. The NH3 oxidation was described by a global kinetic model implying the adsorption/desorption of NH3 followed by its reaction with O2. The implemented kinetic parameters were suitable for the reproduction and prediction of the experiments over a broad range of NH3 and O2 concentrations evidencing the reliability of the model.