Effect of Catalytic Stability Enhancement with Mono Aluminum Phosphate and Performance in Commercial FCC Unit

Abstract

Fluid catalytic cracking (FCC) processes are now required to produce gasoline fractions with high octane number and less heavier fuel oil such as slurry oil (SLO), due to the need for environmental preservation and changes in the fuel oil demand structure. The authors previously discovered that addition of mono aluminum phosphate (Al–P) is effective to decrease heavier fuel oil and increase gasoline yield with higher octane number compared to conventional catalyst. In this study, catalyst containing Al–P was operated in the commercial FCC unit to verify the effect of Al–P. Catalyst containing Al–P achieved higher cracking activity and higher octane number than conventional catalyst. In addition, Al–P can suppress zeolite collapse under hydrothermal conditions.