Reaction kinetics of selective catalytic reduction of NOx by propylene over Fe/ZSM-5

Reaction kinetic model, which consists of an adsorption sub-model and a reduction sub-model, was proposed for the selective catalytic reduction of NOx by propylene over Fe/ZSM-5. The adsorption sub-model consists of two Freundlich type isotherm equations and the reduction sub-model includes two power-law equations. The parameters of these sub-models were fitted separately by O2 adsorption, NOx adsorption and NOx reduction experiments. The model showed great agreement with the experimental data and could be used as a tool to simulate deNOx reactors. Further simulation provided some suggestion on how to improve the catalyst performance and reactor process based on the temperature and O2 effect for the deNOx reaction.

► Developed a kinetic model for SCR of NOx by C3H6 over Fe/ZSM-5.
► Fitted parameters separately from adsorption and NOx reduction data.
► Captured impacts of O2, HC and catalyst loading on NOx conversion.