Study of Modeling Approach for Fluid Catalytic Cracking Riser Reactor Using Pseudo Component Reaction Kinetics

Abstract

Fluid catalytic cracking modeling and simulation are based upon different kinetic modeling .The kinetic models are classified on the basis of chemical entities. The entities are ?lumps? based on boiling point , chemical type and structured oriented lumping . Boiling point based lump models are easy to simulate because they have less complexity and required least amount of data, where as chemical type and structured based modeling require detail analysis of feed and data to calibrate the kinetic parameters. Pseducomponents based modeling approach for the kinetic parameter estimation, eliminates the need for determining a large number of rate constant required in conventional lumped models. Kinetic model play a important role in effective simulation of fluid catalytic cracking Most of the experimental works are limited to micro activity test (MAT) reactor. Due to poorly defined reaction mechanism, scale up from laboratory result to industrial scale is not possible. Major drawback lies in the single-event reaction mechanism being used for modeling/analysis of FCC kinetics. By using a new concept of pseudo-kinetic reaction mechanism better predictability of yield can be obtained if proper hydrodynamic model is used.