A Kinetic Model for Flexible Dual-riser Fluid Catalytic Cracking Process

摘要

According to the mechanism of catalytic cracking reactions, the characteristics of flexible dual-riser fluid catalytic cracking (FDFCC) process, a 10-lumped kinetic model for heavy oil riser reactor and a seven-lumped kinetic model for gasoline riser reactor were developed in the article to simulate the FDFCC process. Based on the data from a commercial FDFCC unit, 43 kinetic parameters for the ten-lumped kinetic model and 18 kinetic parameters for the seven-lumped kinetic model were calculated by the stepwise method. The validity check of the model show that the calculated values of the models are close to the commercial data. In general, the two models could not only describe reaction rules of the FDFCC process correctly but also give good prediction for the distribution and composition of main products, especially for gasoline and propylene.