Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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THE FAST PYROLYSIS CHARACTERISTICS OF LIGNOCELLULOSIC BIOMASS IN A BUBBLING FLUIDIZED BED REACTOR

기포 유동층 반응기내 목질계 바이오매스의 급속열분해 특성

  • 최항석 (한국기계연구원, 그린환경기계연구본부)
  • Received : 2011.04.18
  • Accepted : 2011.05.17
  • Published : 2011.06.30
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Abstract

The fast pyrolysis characteristics of lignocellulosic biomass are investigated for a bubbling fluidized bed reactor by means of computational fluid dynamics (CFD). To simulate multiphase reacting flows for gases and solids, an Eulerian-Eulerian approach is applied. Attention is paid for the primary and secondary reactions affected by gas-solid flow field. From the result, it is scrutinized that fast pyrolysis reaction is promoted by chaotic bubbling motion of the multiphase flow enhancing the mixing of solid particles. In particular, vortical flow motions around gas bubbles play an important role for solid mixing and consequent fast pyrolysis reaction. Discussion is made for the time-averaged pyrolysis reaction rates together with time-averaged flow quantities which show peculiar characteristics according to local transverse location in a bubbling fluidized bed reactor.

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References

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