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Chemical looping gasification of high-moisture content biomass: The interactions between H2O and oxygen carrier

Author

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  • Li, Zhiyu
  • Li, Jian
  • Yu, Tianxiao
  • Jia, Xiaopeng
  • Zhao, Juan
  • Yan, Beibei
  • Chen, Guanyi

Abstract

The control and utilization of water is crucial during chemical looping gasification of high-moisture-content biomass waste. In this study, digestate, as a typical high-moisture-content biomass, was selected as the feedstock. Three types of gasification conditions, including self-moisture pyrolysis (SMP), self-moisture CLG (SMCLG), and externally injected steam CLG (SCLG), were tested to comparatively investigate the effects of different types of H2O on CLG. The transformation of H2O during gasification and the interactions between H2O and LaCu0.5Fe0.5O3 OC were also explored. Results showed that, SMCLG showed the best performance, and the highest gasification efficiency reached 81.83% when the self-moisture content was 40%. The characterization results showed that OC could absorb H2O at low temperature and release it at higher temperature, thus facilitating the gasification of pyrolytic char. Based on density functional theory (DFT) calculation, the migration path of H2O on OC was explained. The adsorption of H2O was mainly due to the formation of FeO bond between Fe and H2O, and then H2O dissociated into OH and H on Fe atom. H is transferred to La atom to form LaH. This study investigated the effect of OC on the migration and transformation of H2O in CLG, which provided a new perspective and development direction for the engineering treatment of digestate, as well as scientific support for the promotion and application of CLG.

Suggested Citation

  • Li, Zhiyu & Li, Jian & Yu, Tianxiao & Jia, Xiaopeng & Zhao, Juan & Yan, Beibei & Chen, Guanyi, 2024. "Chemical looping gasification of high-moisture content biomass: The interactions between H2O and oxygen carrier," Applied Energy, Elsevier, vol. 368(C).
    • Handle: RePEc:eee:appene:v:368:y:2024:i:c:s0306261924009127
    DOI: 10.1016/j.apenergy.2024.123529
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    References listed on IDEAS

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    1. Tianxu Shen & Jiang Zhang & Laihong Shen & Lei Bai & Jingchun Yan, 2020. "Chemical Looping Co-Gasification Characteristics of Cyanobacterial/Coal Blends," Energies, MDPI, vol. 13(9), pages 1-15, May.
    2. Xin Chen & Junxiang Chen & Huayu Chen & Qiqi Zhang & Jiaxuan Li & Jiwei Cui & Yanhui Sun & Defa Wang & Jinhua Ye & Lequan Liu, 2023. "Promoting water dissociation for efficient solar driven CO2 electroreduction via improving hydroxyl adsorption," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    3. Bao Qiu & Minghao Zhang & Lijun Wu & Jun Wang & Yonggao Xia & Danna Qian & Haodong Liu & Sunny Hy & Yan Chen & Ke An & Yimei Zhu & Zhaoping Liu & Ying Shirley Meng, 2016. "Gas–solid interfacial modification of oxygen activity in layered oxide cathodes for lithium-ion batteries," Nature Communications, Nature, vol. 7(1), pages 1-10, November.
    4. Zijun Huang & Dedong He & Weihua Deng & Guowu Jin & Ke Li & Yongming Luo, 2023. "Illustrating new understanding of adsorbed water on silica for inducing tetrahedral cobalt(II) for propane dehydrogenation," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
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