Preparation and characterization of Pt/silicalite catalysts with high Pt loadings

Abstract

Abstract Methods for preparing Pt/silicalite catalysts are described. Equilibration of silicalite, a pentasil zeolite, in aqueous solutions of Pt(NH 3 ), Cl 2 containing excess ammonia resulted in Pt/silicalite catalysts with Pt loadings of ≥7 wt%. The Pt/silicalite catalysts were characterized by hydrogen chemisorption, X‐ray diffraction and transmission electron microscopy. The characterization studies showed that the majority of the Pt in the heavily loaded catalysts was located in the silicalite pores, and the Pt dispersions in these catalysts exceeded 0.8.