Catalytic De-Hydrodesulfidation Of Gasoline

DE LASA H.; HERNÁNDEZ E.; TONETTO G.

Philadelphia

Conferencia; 19th North American Catalysis Society Meeting; 2005

This study presents a potentially attractive catalytic route for the desulfurization of gasoline: catalytic de-hydrosulfidation. The proposed study involves thermodynamic calculations and experimentation in a Chemical Reaction Engineering Centre (CREC) fluidized riser simulator. A ZSM-5 catalyst is used for this study, given its demonstrated performance for the dehydration of methanol, a parent reaction with an expected similar reaction network. Regarding catalyst characterization, it is developed using several techniques: a) surface area (BET), b) concentration of acid sites (ammonia-TPD), and c) sodium content (SEM-EDX) at various stages of catalyst preparation. The catalytic de-hydrodesulfidation reaction is studied using a model compound (ethyl mercaptan, EM) dissolved in a solvent (n-octane, nC8) to represent sulfur-contaminated gasoline. The experimental data obtained is successfully fitted to a kinetic model to represent the rate of disappearance of the sulfur containing species.