5-Lump kinetic model for gas oil catalytic cracking

A new 5-lump kinetic model is proposed to describe the gas oil catalytic cr acking (FCC) process. The model contains eight kinetic constants, including one for catalyst deactivation, taking into account LPG (combined C-3 - C-4 ), dry gas (C-2 and lighter) and coke yields separately from other lumps (u nconverted gas oil and gasoline). Apparent activation energies were determi ned from experiments obtained in a microactivity reactor (MAT) at temperatu res: 480 degrees C, 500 degrees C and 520 degrees C; for a catalyst-to-oil ratio of 5 using vacuum gas oil and equilibrium catalyst, both recovered fr om an industrial FCC unit. Product yields predicted by this model show good agreement with experimental data. (C) 1999 Elsevier Science B.V. All right s reserved.