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Article
A practical countercurrent FCC regenerator model for in-situ operation optimization
AIChE Journal (2011)
  • Yongmin Zhang
  • Chunxi Lu
  • Tingwen Li, National Energy Technology Laboratory
Abstract
We proposed a practical countercurrent FCC regenerator model with improved descriptions of gas and solid flow patterns. A three-zone & two-phase gas model was utilized to describe the gas flow through the regenerator, addressing the different phase mass transfer properties in the different zones. A new two-CSTR-with-interchange model was used to describe the solid flow and to address the effect of freeboard on catalyst regeneration. Otherwise, this model also considered the usually adopted expanding section for reducing solid carryover. The model was programmed in Matlab language with coupled hydrodynamics and reaction kinetics models and tested and validated by the data from an industrial FCC regenerator operated under both partial and full CO combustion modes. After fitting a single model parameter, the interchange solid flux between the dense bed and freeboard, the model predictions were in reasonable agreement with the commercial data for both modes.
Keywords
  • Regenerator; Model; Fluid Catalytic Cracking; fluidized bed
Publication Date
2011
Citation Information
Yongmin Zhang, Chunxi Lu and Tingwen Li. "A practical countercurrent FCC regenerator model for in-situ operation optimization" AIChE Journal (2011)
Available at: http://works.bepress.com/tli/35/