The Development Of Catalytic Cracking Kinetics Software And Research On Producing More Gasoline

In this study,experiments are carried out on a catalytic cracking riser reactor pilot plant to investigate the effects of different reaction pressures on the distribution and properties of catalytic cracking products.Based on the pilot test,a 14 lumped reaction kinetics model is established based on the reaction mechanism and characteristics of the heavy oil catalytic cracking riser.The 14 lumps include saturates(Rs),aromatics(Ra),resin and bitumen(Rrb),diesel paraffins(Pd),diesel naphthenic hydrocarbons and olefins(Nd),diesel aromatics(Ad),gasoline paraffins(Pg),gasoline naphthenes(Ng),gasoline olefins(Og),gasoline aromatics(Ag),propylene(Pl),else of LPG(El),dry gas(Gas)and coke(Ck).Based on the lumped theory and the catalytic cracking reaction mechanism,reasonable assumptions are made and a 14 lumped reaction network containing 74 reactions and a dynamic equation of the model is established.The fourth-order RungeKutta method is used to solve the differential equations.The two-group cooperative particle swarm optimization algorithm is used to optimize the objective function.A total of 74 sets of reaction rate constants and activation energy parameters are obtained.The statistical test results show that the model has good prediction accuracy.Based on the 14 lumped kinetic model of catalytic cracking,a catalytic cracking simulation software is developed.The software can predict the distribution and properties of FCC products and predict the optimal operating conditions of catalytic cracking.