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Biomass briquette gasification is regarded as apromising route for efficient briquette use in energy generation, fuelsand other useful chemicals. However, previous research has beenfocused on briquette gasification in fixed bed gasifiers such asupdraft and downdraft gasifiers. Fluidised bed gasifier has thepotential to be effectively sized to medium or large scale. This studyinvestigated the use of fuel briquettes produced from blends of ricehusks and corn cobs biomass, in a bubbling fluidised bed gasifier.The study adopted a combination of numerical equations and AspenPlus simulation software, to predict the product gas (syngas)composition base on briquette density and biomass composition(blend ratio of rice husks to corn cobs). The Aspen Plus model wasbased on an experimentally validated model from the literature. Theresults based on a briquette size 32 mm diameter and relaxed densityrange of 500 to 650kg/m3, indicated that fluidisation air required inthe gasifier increased with increase in briquette density, and thefluidisation air showed to be the controlling factor compared with theactual air required for gasification of the biomass briquettes. Themass flowrate of CO2 in the predicted syngas composition increasedwith an increase in air flow, in the gasifier, while CO decreased andH2 was almost constant. The ratio of H2 to CO for various blends ofrice husks and corn cobs did not significantly change at the designedprocess air, but a significant difference of 1.0 was observed between10/90 and 90/10 % blend of rice husks and corn cobs.

Fluidised Bed Gasification of Multiple Agricultural Biomass Derived Briquettes