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2-D Modeling of thermo-kinetics coupled with heat and mass transfer in the reduction zone of a fixed bed downdraft biomass gasifier

Author

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  • Masmoudi, Mohamed Ali
  • Sahraoui, Melik
  • Grioui, Najla
  • Halouani, Kamel

Abstract

A two dimensional modeling is developed in the reduction zone of a fixed bed downdraft biomass gasifier based on mass, energy and momentum conservation equations written for the solid and fluid phases and coupled with chemical kinetics. Kinetics parameters are derived from previous works and an effectiveness factor was used in the reaction rate correlation to quantify the mass transfer resistance in the bed. The obtained numerical results are compared with experimental and numerical data from literature and a reasonable agreement is observed. Fields of temperature, gaseous concentrations are investigated for the two-dimensional domain. Results show that the solid and fluid inlet temperatures to the reduction zone and the reactivity of the bio-char including the effectiveness factor are the main variables affecting the conversion of char to syngas in the gasification zone of the fixed bed reactor.

Suggested Citation

  • Masmoudi, Mohamed Ali & Sahraoui, Melik & Grioui, Najla & Halouani, Kamel, 2014. "2-D Modeling of thermo-kinetics coupled with heat and mass transfer in the reduction zone of a fixed bed downdraft biomass gasifier," Renewable Energy, Elsevier, vol. 66(C), pages 288-298.
    • Handle: RePEc:eee:renene:v:66:y:2014:i:c:p:288-298
    DOI: 10.1016/j.renene.2013.12.016
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    References listed on IDEAS

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    1. Puig-Arnavat, Maria & Bruno, Joan Carles & Coronas, Alberto, 2010. "Review and analysis of biomass gasification models," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(9), pages 2841-2851, December.
    2. Banapurmath, N.R. & Tewari, P.G., 2009. "Comparative performance studies of a 4-stroke CI engine operated on dual fuel mode with producer gas and Honge oil and its methyl ester (HOME) with and without carburetor," Renewable Energy, Elsevier, vol. 34(4), pages 1009-1015.
    3. Roy, Prokash C. & Datta, Amitava & Chakraborty, Niladri, 2010. "Assessment of cow dung as a supplementary fuel in a downdraft biomass gasifier," Renewable Energy, Elsevier, vol. 35(2), pages 379-386.
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