Fluidized catalytic cracking in a low-profile unit.

摘要

A nominal 50 barrel per day pilot plant Low Profile Fluidized Catalytic Cracking Unit (LPFCCU) was constructed and operated at various feed rates, cracking temperatures, and residence times. The low profile is achieved by use of an alternating series of short lifts and drops to move catalyst. This allows the unit to be much shorter than conventional catalytic cracking units. The alternating series of short lifts also allows use of multiple, independent feeds. This increases throughput and allows the reaction conditions to be tailored to each feed. Advantages of the new process (LPFCC) over conventional FCC include increased product octane number, increased light olefin yield, and increased isobutane make. Measured octane numbers, (R + M)/2, for the IBP-200