SINGLE-EVENT RATE PARAMETERS FOR PARAFFIN HYDROCRACKING OIL A PT/US-Y ZEOLITE

A single-event kinetic model is applied to octane hydrocracking on a Pt/US-Y zeolite over a wide range of experimental conditions (T = 200-260 degrees C; P = 10-50 bar). The single-event kinetic approach used in this paper draws on the chemical knowledge of the elementary steps occurring on the catalyst surface, retaining the full detail of the reaction network. The hundreds of rate coefficients of the elementary steps in the reaction network are expressed in terms of a practical number of single-event rate coefficients. Rate equations are developed for the paraffins and the olefin and carbenium ion surface intermediates based on this network. Finally, single-event rate coefficients are estimated for both isomerization and cracking reactions.