Investigating Hydro-Thermal Aging of a Pd-Pt/Al2O3 Used for Lean Methane Oxidation: A Coupled Experimental-Theoretical Modeling Approach

A predictive model is developed that captures the impact of hydrothermal aging on a Pt/Pd catalyst. For a 72 hour hydrothermal aging, model predicted that surface metals concentration reduced from 0.312 10¹⁶ to 0.253 10¹⁶. Reaction rate constant was reduced by ~20% compared to that of fresh catalyst and ultimately TPO conversion dropped by ~10%.