Different morphological ZSM-5 zeolites supported Pt catalysts for toluene catalytic combustion

Various ZSM-5 zeolites with different morphologies (plate, brick, and spherical-like) supported Pt were synthesized as catalysts for the combustion of toluene. H2-TPR, SEM, XRD, N2 sorption, and NH3-TPD, among other methods, were adopted to measure their physicochemical characteristics. The findings show that zeolite shape substantially impacts the performance of the combustion of toluene. When compared to the other two catalysts, the plate-like ZSM-5 supported Pt (denoted as P-Pt/ZSM-5) exhibits better performance for toluene combustion due to its better dispersion of Pt species, smaller Pt particle sizes, and more potent acid sites. At 170 °C for 60 h, P-Pt/ZSM-5 exhibits the high stability with a 97% toluene conversion. Additionally, the toluene conversion only decreases by around 8% with the addition of 3.0 wt% H2O.