Study On The 12-lumped Kinetic Model For Residual Fluid Catalytic Cracking On Advanced Catalytic Cracking Equipment

According to the reaction mechanism,composition of feedstock oil and product distribution for heavy oil catalytic cracking process,the reaction system was divided into 12 Lumps including saturation(HS),aromatic(HA),resin and asphaltene(HR),diesel(DIESEL),gasoline saturated(GS),gasoline olefins(GO),gasoline aromatics(GA),dry gas(DGAS),propylene(LO3),butene(LO4),alkane in liquefied gas(LPGD)and coke(COKE),a reaction network including 54 reaction paths for was set up.The kinetic equations for the 12 lumped model were deduced,the differential equations is solved by the RK4 method and the differential evolution algorithm is used for global optimization calculations.According to experimental data from Advanced Cracking Equipment(ACE),the kinetic parameters of the model are calculated,and the model parameters are corresponding with the basic catalytic cracking reaction rules.The verification results showed that the model has good reliability.A practical RFCC 12-lumped kinetics model software for the ACE was developed.The effects of operating conditions on product distribution were investigated by the software.The results show that the predictability of the model is corresponding with the catalytic cracking reaction rules and it has a good guidance for the experiment and production.The multi-target product yields can be optimized by condition optimization module in the software.It shows that the model has good guidance for operation optimization.