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Comparison of Two Models for FCC Units
Catalysis Today (1997)
  • Rafael Maya-Yescas
  • Felipe López-Isunza
Abstract

Modelling FCC units has been an interesting activity because of the complexity of the system and the economic incentives associated. Models have been clasified depending on either the used kinetic scheme or the proposed reactor configuration. The main problems to asses are the eliminination of coke when the catalyst is regenerated and the delicate interaction between reactor and regenerator due to the global energy balance. In this work two models, each one using different kinetic schems, different formulation for the catalyst activity and different conception of the regenerator are compared when simulating the same FCC unit. Steady state predictions and dynamic phenomena such as stability and multiplicity are simulated. In order to emphasise the ability for prediction of dynami phenomena, the results obtained are compared in rms of accuracy and computer resolution time. It is pointed out that eventhough the complexity of a model could be limiting for control purpouses, in the case of dynamic studies this factor is not a constraint and it is possible to use more complex models. It is also emphasise that the most useful model will be the one which fulfills requirements or researcher, situation to be modelled and results required.

Keywords
  • FCC,
  • lumped kinetic scheme,
  • mathematical modelling,
  • reaction kinetics,
  • reactor dynamics,
  • steady state multiplicity
Disciplines
Publication Date
1997
Citation Information
Rafael Maya-Yescas and Felipe López-Isunza. "Comparison of Two Models for FCC Units" Catalysis Today Vol. 38 Iss. 1 (1997)
Available at: http://works.bepress.com/rafael_maya_yescas/25/