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SIMULATION OF BIOMASS GASIFICATION IN FLUIDIZED BEDS USING COMPUTATIONAL FLUID DYNAMICS APPROACH

ABSTRACT
A model was developed for the simulation of physical and chemical processes occurring during biomass gasification inside a fluidized bed. The commercial CFD software "FLUENT" was employed for the description of turbulent fluid flow, heat transfer, species transport, devolatilization and particle combustion and gas phase chemical reaction. The emulsion phase of the fluidized region was modeled as a porous region, while stationary "free" areas were prescribed to account for the rising gas pockets (bubbles) inside the bed. Available experimental measurements were used for model setup and validation of the calculations, in terms of species mass fractions and temperature at the gasifier outlet.
PAPER SUBMITTED: 2001-12-22
PAPER REVISED: 2002-01-16
PAPER ACCEPTED: 2002-01-20
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THERMAL SCIENCE YEAR 2001, VOLUME 5, ISSUE 2, PAGES [95 - 105]
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