Modeling and Simulation of a Downer-Type HS-FCC Unit
2008
Mathematical models and simulations of an integrated downer-regenerator FCC unit are presented. The models describe the steady-state nonisothermal behavior of the interdependent heavy oil cracking downflow reactor and catalyst regeneration fluidized-bed reactor. The models are rooted in four-lump cracking reaction kinetics and complete combustion kinetics for the regenerator reactions. Simulations results for the downertype unit are partially validated against data collected in a 0.1-0.3 b/day pilot plant that was operated in the high-seVerity mode. The results are fairly reasonable especially in regard to predicting the performance of the cracking reactor.
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