CFD modelling of the fast pyrolysis of biomass in fluidised bed reactors. Part B: Heat, momentum and mass transport in bubbling fluidised beds

K. Papadikis, Anthony V. Bridgwater, S. Gu

Research output: Contribution to journalArticle

Abstract

The fluid–particle interaction inside a 150 g/h fluidised bed reactor is modelled. The biomass particle is injected into the fluidised bed and the heat, momentum and mass transport from the fluidising gas and fluidised sand is modelled. The Eulerian approach is used to model the bubbling behaviour of the sand, which is treated as a continuum. Heat transfer from the bubbling bed to the discrete biomass particle, as well as biomass reaction kinetics are modelled according to the literature. The particle motion inside the reactor is computed using drag laws, dependent on the local volume fraction of each phase. FLUENT 6.2 has been used as the modelling framework of the simulations with the whole pyrolysis model incorporated in the form of user-defined function (UDF). The study completes the fast pyrolysis modelling in bubbling fluidised bed reactors.
Original languageEnglish
Pages (from-to)1036-1045
Number of pages10
JournalChemical Engineering Science
Volume64
Issue number5
DOIs
Publication statusPublished - Mar 2009

Fingerprint

Pyrolysis
Mass Transport
Biomass
Reactor
Momentum
Computational fluid dynamics
Mass transfer
Heat
Sand
Modeling
FLUENT
Reaction Kinetics
Drag
Volume Fraction
Reaction kinetics
Heat Transfer
Volume fraction
Continuum
Gases
Heat transfer

Keywords

  • CFD
  • fluidised bed
  • fast pyrolysis
  • heat transfer
  • particle modelling
  • bioenergy
  • chemical engineering

Cite this

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