19-P-08 - Transient uptake measurements using an oscillating microbalance: effect of acid leaching on the diffusivity of n-hexane in Pt/H-mordenite

Abstract

This chapter presents transient uptake measurements using an oscillating microbalance. Measurements performed in a tapered element oscillating microbalance (TEOM) reveal that diffusivities can be derived from uptake data monitored under full reaction conditions. The effect of acid leaching on the diffusional behavior of n -hexane in platinum (Pt)/H-Mordenite is investigated. Acid leaching largely enhances the n -hexane uptake rate, but does not result in a net increase in the intracrystalline steady state diffusivity. The accelerated uptake after acid leaching merely arises from the shorter intracrystalline diffusion path resulting from the mesoporous structure.