Study On A 7-lump Kinetic Model For Heavy Oil Catalytic Cracking In Advanced Cracking Evaluation Equipment

Fluid catalytic cracking(FCC)is one of the most important heavy oil conversion processes used in petroleum refineries.Advanced cracking evaluation(ACE)is one of important evaluation method for FCC process and FCC catalyst.Based on the reaction mechanism of FCC process and features of feedstock oil composition and ACE,the entire reaction system was divided into 7 lumps containing saturate(HS),aromatics(HA),resin plus asphaltene(HR),diesel(Diesel),gasoline(Gasoline),cracked gas(Gas)and coke(Coke).A reaction network for the 7 lumps,including 17 reaction paths for the 7 lumps was constructed.The kinetic equations for the 7 lump model were derived and parameter calculation methods were established.According to the experimental data from a ACE equipment,the kinetic parameters of the 7-lump model including 17 pre-exponential factors,17 reaction activation energies and three catalyst deactivation constants were calculated,and the model parameters were agreeable with the basic reaction rules of heavy oil catalytic cracking.The validation indicates that the established model is reasonable and reliable.A 7-lump kinetics model software for ACE equipment,which can meet the calculation requirement for the model was developed.The 7-lump kinetics model can play an important role in evaluating FCC process and FCC catalyst and optimizing operation condition.