Mathematical model of biomass gasification using high temperature air in fixed beds Online publication date: Sat, 30-Dec-2006
by Carlos Lucas, Weihong Yang, Anna Ponzio, Wlodzimierz Blasiak, Yao Bin Yang, Vida N. Sharifi, Jim Swithenbank
Progress in Computational Fluid Dynamics, An International Journal (PCFD), Vol. 7, No. 1, 2007
Abstract: A mathematical model has been formulated for predicting the main chemical and physical processes taking place during the fixed-bed gasification of biomass fuels using high temperature air (up to 1000°C). Predicted gas species concentrations profiles and their maximum values are in good agreement with measurements. The results also show that when the temperature of feed gas (air) is increased a higher gasification rate, higher molar fractions of fuel gases (CO, H2 and CmHn) are obtained, thus resulting in a higher LHV. At a high flow rate of the feed gases, the peaks of the fuel gas concentrations are slightly increased, and the gasification rate is strongly increased. A smaller particle size of the biomass fuels leads to higher peak values of the fuel gas species molar fractions, and a more stable gasification zone for a relatively long period of time.
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