A new lumping kinetic model for fluid catalytic cracking

Abstract

In the modeling of fluid catalytic cracking reaction, it is necessary to take slurry as an independent lump due to the great difference between feedstock properties and slurry properties. Based on the commercial data and the reaction mechanism of catalytic cracking, the 8 lumped kinetic model including slurry lump and 7 lumped kinetic model excluding slurry lump were developed combined with the characteristics of the MIP (maximizing isoparaffins) reaction. By means of Fourth-order Runge-Kutta integral method and two-swarm cooperative particle swarms optimization method, the kinetic model parameters were estimated, respectively. The average relative error between commercial data and calculated values, as well as the results of product predictions, indicate that the eight-lumped kinetic model has higher prediction accuracy, and the predicted results of slurry yield are more in line with the actual industrial conditions.