Influence of the macroscopic distribution of platinum in PtHFAU catalysts on their activity for n-hexane isomerization

The macroscopic distribution of platinum in extrudates of bifunctional PtHFAU/Al2O3 catalysts is shown to have a significant effect on their activity, stability and selectivity in n-hexane transformation under hydrogen pressure. The best catalysts are those for which platinum is homogeneously dispersed. n-Hexane transformation is proposed as a model reaction for estimating the macroscopic distribution of platinum in industrial catalyst pellets.