Construction of kinetic model for catalytic cracking of direct distillation gasoline using structure oriented lumping method

A kinetic model for direct distillation gasoline catalytic cracking was developed according to a new structure oriented lumping(SOL)method.74 kinds of molecules were selected to describe feedstock.42 kinds of reaction rules were established to construct reaction networks in this model based on the carbonium ion mechanism of catalytic cracking.Modified matrix transformation method was used to solve reaction networks to obtain product matrix.Product distribution and gasoline group composition could be obtained by classifying the molecules in product matrix.The experiment data of direct distillation gasoline catalytic cracking in a fixed fluid bed unit was used to verify the model.The results showed that the predicted product distribution and gasoline group composition agreed well with the experimental data.And the model had better adaptability when temperature and feedstock composition changed,and could also predict research octane number of gasoline.