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MODELLING A FLUIDIZED BED REACTOR BY INTEGRATING VARIOUS SCALES: PORE, PARTICLE, AND REACTOR
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  • Robert Macias,
  • Juan Maya,
  • Farid Chejne,
  • Zainab Afailal,
  • Jesús Arauzo Pérez
Robert Macias
Universidad Nacional de Colombia Sede Medellin
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Juan Maya
Universidad Nacional de Colombia Sede Medellin
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Farid Chejne
Universidad Nacional de Colombia Sede Medellin
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Zainab Afailal
Universidad de Zaragoza
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Jesús Arauzo Pérez
Universidad de Zaragoza
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Abstract

This work proposes a novel population-balance based model for a bubbling fluidized bed reactor. This model considers two continuum phases: bubble and emulsion. The evolution of the bubble size distribution was modeled using a population balance, considering both axial and radial motion. This sub-model involves a new mathematical form for the aggregation frequency, which predicts the migration of bubbles from the reactor wall towards the reactor center. Additionally, the reacting particles were considered as a lagrangian phase, which exchanges mass with the emulsion phases. For each particle, the variation of the pore size distribution was also considered. The model presented here accurately predicted the experimental data for biochar gasification in a lab-scale bubbling fluidized bed reactor. Finally, the aggregation frequency is shown to serve as a scaling parameter.

Peer review status:UNDER REVIEW

18 May 2020Submitted to AIChE Journal
27 May 2020Assigned to Editor
27 May 2020Submission Checks Completed
23 Jun 2020Reviewer(s) Assigned