Abstract
Olive tree pruning was gasified with air in a laboratory fluidized bed (FB) reactor at 800, 850, and 900 °C and equivalence ratios (ERs) ranging from 0.12 to 0.35. A few additional tests were performed varying the fuel particle size, biomass feed rate, and oxygen enrichment in the air. The composition of the product gas was determined by measuring the light gas, water vapor, tar, and some inorganic contaminants. The solids produced were characterized by sampling from the cyclone and bed, providing approximate information about the char elutriation rate and residence time. The lower heating value of the gas, LHV (excluding benzene and tars), varied between 4.5 and 7.8 MJ/(Nm3) using air, whereas it increased to 9.3 MJ/(Nm3) using enriched air with 40% O2.. Carbon conversion increased with temperature (so did gasification efficiency), reaching 97% at 900 °C, indicating almost complete fuel conversion. Analysis of the results with the assistance of a previously developed FB gasification model indicated that ...
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