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Modeling and Simulation of the Catalyst Regeneration Process of FCC Unit of Abadan Refinery

Loni, Zahra | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44997 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Baghalha, Morteza
  7. Abstract:
  8. Hydrodynamics plays a crucial role in defining the performance of fluidized beds. The numerical simulation of fluidized bed is very important in the prediction of its behaviour. From this point of view, in the present study a dynamic two dimensioanl model is developed for the modeling of regenerator system of a UOP fluid catalytic cracking (FCC) unit of Abadan refinery with a high-efficiency regenerator. Of the various modeling and simulation techniques, computational fluid dynamics (CFD) is employed in this thesis. Effects of gas velocity, the transient local solid volume fraction, pressure drop for gas and solid phase, solid holdup distribution and solid circulation pattern have been investigated. No significant difference has been observed between results after application of laminar and turbulence model. For geldart B particles, it has been revealed that the bed expansion was larger when a kinetic theory of granular flow has been applied compared with the case of empirical models for the solid phase properties. For Geldart A particles, the overestimation of the bed expansion has been resolved by using a suitable scale factor in the standard drag model to reduce the universal drag laws, which accounts for the effect of particle clustering. For combustor type regenerator, the average of solid phase volume fraction in different computational domains such as combustion section, combustor cone, and combustor riser is compatible with operating data of Abadan refinery. The simulation results showed both qualitative and quantitative agreement with the literature
  9. Keywords:
  10. Solid-Gas Fluidized Bed ; Computational Fluid Dynamics (CFD) ; Fluid Catalytic Cracking (FCC)Process ; Hydrodynamic Modeling ; Abadan Refinery

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