Acidity, Activity and Micro-Kinetics Studies in an H-ZSM5

An H-ZSM5 zeolite has been characterized by TPD of ammonia and its performance was tested with several olefins (ethylene and propylene) and n-hexane. The catalytic tests were performed at a wide range of temperatures (300 – 450°C) and molar fractions of reagent in the feed. The results from the TPD have been deconvoluted in order to obtain a distribution of the strength of the acidity of the active sites. A micro-kinetic model and a simplified kinetic equation have been developed and fitted to results for the conversion of n-hexane and the olefins, respectively.