Characteristics of the gas produced during biomass direct gasification in an autothermal pilot-scale bubbling fluidized bed reactor

D.T. Pio, L.A.C. Tarelho and M.A.A. Matos

Energy, 2017, vol. 120, issue C, 915-928

Abstract: Direct (air) biomass gasification was demonstrated in a pilot-scale bubbling fluidized bed reactor and the influence of process parameters analyzed. For the operating conditions used, namely equivalence ratio between 0.17 and 0.36 and bed temperature between 700 and 850 °C, the process was demonstrated as autothermal and operating under steady-state. The dry gas produced shows the following composition (volumetric basis): 14.0–21.4% CO, 14.2–17.5% CO2, 3.6–5.8% CH4, 1.3–2.4% C2H4, 2.0–12.7% H2 and 48.9–61.1% N2. The lower heating value of the dry gas was between 4.4 and 6.9 MJ/Nm3, with the highest values observed during the experiments with lower equivalence ratio. The specific dry gas production was between 1.2 and 2.2 Nm3/kg biomass (dry basis), the cold gas efficiency between 41.1 and 62.6% and the carbon conversion efficiency between 60 and 87.5%.

Keywords: Biomass; Bubbling fluidized bed; Gasification (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (21)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:120:y:2017:i:c:p:915-928

DOI: 10.1016/j.energy.2016.11.145

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