CFD simulation with experiments in a dual circulating fluidized bed gasifier

Thanh D.B. Nguyen, Myung Won Seo, Young Il Lim, Byung Ho Song, Sang Done Kim

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77 Scopus citations


Gas and particles hydrodynamic behaviors were investigated in a pilot-scale cold-mode riser and a bubbling fluidized bed gasifier by means of experiment and computational fluid dynamics (CFD).Six different experimental sets were conducted in the cold-rig dual fluidized bed (DFB) at different gas velocities in both the riser and the recycle chamber aeration. A two-dimensional (2D) multi-fluid Eulerian model incorporating the kinetic theory of granular flows was applied to identify unsteady-state behaviors of the fluidized bed.The CFD model predicts well the solid circulation rate in the cold-rig DFB for all the six experimental runs. A discrepancy between experiment and simulation is observed in the axial solid holdup along the riser. The simulation results demonstrate that the cold-bed simulation can be used to predict the solid circulation rate for the hot-bed operation of the DFB gasifier.

Original languageEnglish
Pages (from-to)48-56
Number of pages9
JournalComputers and Chemical Engineering
Issue number1
StatePublished - 10 Jan 2012


  • Computational fluid dynamics (CFD)
  • Dual circulating fluidized-bed (DFB) gasifier
  • Hydrodynamics
  • Multiphase flow
  • Simulation
  • Solid circulation rate


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