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Effect of active alkali and alkaline earth metals on physicochemical properties and gasification reactivity of co-pyrolysis char from coal blended with corn stalks

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  • Chen, Xiye
  • Liu, Li
  • Zhang, Linyao
  • Zhao, Yan
  • Xing, Chang
  • Jiao, Zixin
  • Yang, Chunhui
  • Qiu, Penghua

Abstract

During co-pyrolysis, active alkali and alkaline earth metals (AAEMs) can influence the synergistic effect of coal and biomass. For exploring the influence of active AAEMs on the co-pyrolysis process, this paper studied the physicochemical properties and gasification reactivity of co-pyrolysis char of four blends: raw coal and raw corn stalks (RC&RCS), pickling coal and raw corn stalks (HC&RCS), raw coal and pickling corn stalks (RC&HCS), and pickling coal and pickling corn stalks (HC&HCS). The results show that the synergistic effects on char yields are within 3%. During co-pyrolysis, the presence of corn stalks is beneficial to the generation of spherical particles from coal char, and the promotion effect of pickling corn stalks is greater than that of the raw corn stalks. The active AAEMs have an inhibitory effect on the decomposition of aliphatic C–H, CO and –CH3 in Shenmu coal, and also on the decomposition of O–H, aliphatic C–H and C–O in the corn stalks. The experimental values of gasification residual carbon of RC&RCS/HC&RCS co-pyrolysis char are 24–77% of the calculated values, while that of RC&HCS/HC&HCS co-pyrolysis char are 86–103% of the calculated values. The interaction between the blends promotes the reactivity of co-pyrolysis char.

Suggested Citation

  • Chen, Xiye & Liu, Li & Zhang, Linyao & Zhao, Yan & Xing, Chang & Jiao, Zixin & Yang, Chunhui & Qiu, Penghua, 2021. "Effect of active alkali and alkaline earth metals on physicochemical properties and gasification reactivity of co-pyrolysis char from coal blended with corn stalks," Renewable Energy, Elsevier, vol. 171(C), pages 1213-1223.
    • Handle: RePEc:eee:renene:v:171:y:2021:i:c:p:1213-1223
    DOI: 10.1016/j.renene.2021.02.098
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    References listed on IDEAS

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    1. Wei, Juntao & Gong, Yan & Guo, Qinghua & Chen, Xueli & Ding, Lu & Yu, Guangsuo, 2019. "A mechanism investigation of synergy behaviour variations during blended char co-gasification of biomass and different rank coals," Renewable Energy, Elsevier, vol. 131(C), pages 597-605.
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    1. Du, Chongzhen & Yang, Tianhua & Li, Bingshuo & Cao, He & Liu, Zheng & Huang, Shengzhao, 2023. "Effect of alkali and alkaline earth metals on the liquefaction of lignocellulosic model compounds to prepare bio-oil in ethanol solvent," Energy, Elsevier, vol. 278(C).
    2. Jiao, Zixin & Qiu, Penghua & Chen, Xiye & Liu, Li & Zhang, Linyao & Xing, Chang, 2023. "Effects of volatiles and active AAEMs interaction with char on char characteristics during co-pyrolysis," Renewable Energy, Elsevier, vol. 208(C), pages 618-626.
    3. Śpiewak, Katarzyna & Czerski, Grzegorz & Soprych, Piotr, 2023. "Steam gasification of tire char supported by catalysts based on biomass ashes," Energy, Elsevier, vol. 285(C).
    4. Yang, Tianhua & Du, Chongzhen & Li, Bingshuo & Liu, Zheng & Kai, Xingping, 2022. "Influence of alkali and alkaline earth metals on the hydrothermal liquefaction of lignocellulosic model compounds," Renewable Energy, Elsevier, vol. 188(C), pages 1038-1048.

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