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Mathematical Modeling of a Fluidized Bed Rice Husk Gasifier: Part III - Model Verification

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The validity of the two-compartment model developed for fluidized bed gasification of biomass was tested using experimental data obtained from a dual-distributor-type fluidized bed gasifier. The fluidized bed was operated on rice husks at various bed heights (19.5, 25.5, and 31.5 cm), fluidization velocities (0.22, 0.28, and 0.33 m/s), and equivalence ratios (0.25, 0.30, and 0.35). The model gave reasonable predictions of the core, annulus, and exit temperatures as well as the mole fractions of the combustible gas components and product gas higher heating value, except for the overall carbon conversion, which was overestimated. This could be attributed to uncertainties in the sampling procedure.
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Keywords: CARBON; COMPOSITION; CONVERSION; EQUIVALENCE; FLUIDIZATION; FLUIDIZED; GASIFICATION; GASIFIER; HEATING; HIGHER; MATHEMATICAL; TEMPERATURE; VELOCITY

Document Type: Research Article

Publication date: March 1, 2000

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