Modelling of a downdraft gasifier fed by agricultural residues |
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| Authors: | Antonopoulos I-S Karagiannidis A Gkouletsos A Perkoulidis G |
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| Institution: | Laboratory of Heat Transfer and Environmental Engineering, Department of Mechanical Engineering, Aristotle University of Thessaloniki, Box 483, GR-54124, Thessaloniki, Greece |
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| Abstract: | A non-stoichiometric model for a downdraft gasifier was developed in order to simulate the overall gasification process. Mass and energy balances of the gasifier were calculated and the composition of produced syngas was predicted. The capacity of the modeled gasifier was assumed to be 0.5 MW, with an Equivalence Ratio (EQ) of 0.45. The model incorporates the chemical reactions and species involved, while it starts by selecting all species containing C, H, and O, or any other dominant elements. Olive wood, miscanthus and cardoon were tested in the formulated model for a temperature range of 800-1200 °C, in order to examine the syngas composition and the moisture impact on the supplied fuel. Model results were then used in order to design an olive wood gasification reactor. |
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| Keywords: | CFD computational fluid dynamics EES engineering equation solver ER equivalence ratio GMM Gibbs energy gradient method model HHV higher heating value ICE internal combustion engine LHV lower heating value MSW municipal solid waste SV superficial velocity |
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