The reaction characteristics and mechanism of pine sawdust chemical-looping gasification based on CoFe2O4 oxygen carrier

Feng Liu, Ruixue Fang, Xufeng Wang, Jing Liu and Yu Li

Renewable Energy, 2022, vol. 195, issue C, 1300-1309

Abstract: Biomass chemical-looping gasification (BCLG) is a promising technology for high quality syngas production. CoFe2O4 with good redox stability and synergistically enhanced performance is considered as a better oxygen carrier. Herein, the gasification characteristic and mechanism between pine sawdust and CoFe2O4 were studied by using the thermodynamic calculation, thermogravimetric analysis (TGA) and fixed bed reactor experiments. Thermodynamic calculation reveals that the oxygen carrier to pine sawdust ratio, H2O volume fraction and reaction temperature of 0.08, 50%, and 900 °C, respectively, could be optimal for obtaining syngas with high quality and biomass conversion efficiency. CoFe2O4 can provide lattice oxygen for pine sawdust gasification and accelerate the carbon conversion rate of pine sawdust. The existence of Co in CoFe2O4 can synergistically improve the activity of Fe3+ and promote the further reduction of Fe3+ to Fe0. Experimental results verify that pine sawdust gasification process with an oxygen carrier to pine sawdust ratio of 0.08, reaction temperature of 900 °C, and H2O volume fraction of 50% has the highest syngas quality and biomass conversion. After five redox cycles, CoFe2O4 still maintains good reactivity and redox stability. These results can offer useful information for the utilization of biomass energy and can be used to improve the BCLG process.

Keywords: Chemical-looping gasification; Pine sawdust; CoFe2O4; Thermodynamic calculation; Thermogravimetric analysis; Fixed bed reactor (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:195:y:2022:i:c:p:1300-1309

DOI: 10.1016/j.renene.2022.06.134

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