Abstract
This study is devoted to clarifying the biomass gasification characteristics in a fluidized bed coupled with another bed as the char combustor. The necessary residence time for decomposing biomass fuels was first investigated through gasifying 1.0g coffee grounds and bagasse in a laboratory fluidized gasifier using steam as the reagent. Succeeding this a process simulation was conducted with respect to the gasification process quoted above to inter-correlate the available cold gas efficiency with fuel C conversion. The results demonstrated that for achieving cold gas efficiencies higher than 75%, the fuel water content should be necessarily lower than 5 wt.%, whilst the fuel's C conversion has to be over 60%.
