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Syngas production from biomass using Fe-based oxygen carrier: Optimization

Author:
Hu, Jianjun, Li, Chong, Lee, Duu-Jong, Guo, Qianhui, Zhao, Shuheng, Zhang, Quanguo, Li, Dun
Source:
Bioresource technology 2019 v.280 pp. 183-187
ISSN:
0960-8524
Subject:
adverse effects, biomass, carbon, carbon monoxide, corn stover, experimental design, gasification, heat, hydrogen, iron, oxygen, peanut hulls, prediction, rice straw, steam, synthesis gas, temperature, wheat straw
Abstract:
Chemical looping gasification is a promising technology to convert biomass into syngas with low adverse effects by heat loss and production dilution. This study utilized 60% loading Fe₂O₃/Al₂O₃ oxygen carrier (OC) for gasification tests on four biomass samples: rice straw, corn stalk, peanut shell and wheat straw under OC/biomass (OC/B) ratio of 1.0, steam/biomass (S/B) ratio of 2.8, reaction time of 20 min, and reaction temperature of 850 °C. All biomass samples yielded similar gasification performances: CO content 19.2–23.1%, H₂ content 36.5–41.1%, carbon conversion rate 72.3–82.2% and gas yield 0.78–1.04 L/g. The gasification performance using rice straw was optimized on maximum H₂/CO ratio using three levels Box-Behnken experimental design: 899.6 °C, 20.3 min, OC/B = 1.02 and S/B = 2.89, leading to maximum H₂/CO value of 2.20. Verification tests confirmed this prediction. The adopted Fe-based OC can be applied to generate syngas from the tested biomass with promising outcomes.
Agid:
6301789