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The effect of pyrolysis heating rate on the steam gasification reactivity of char from woodchips

Author

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  • Septien, S.
  • Escudero Sanz, F.J.
  • Salvador, S.
  • Valin, S.

Abstract

This work, performed in the context of Gaya project, focuses on the characterization and modelling of the effect of the pyrolysis heating rate on the steam gasification of char from woodchips. An experimental work was performed based on thermogravimetry and solid characterization of char samples prepared under different conditions. The results showed that gasification apparent reactivity increased with the increase of heating rate. The faster chemical kinetics of char prepared under high heating rate could be related to its higher catalytic inorganic content together with a more reactive carbonaceous structure. The increase of heating rate favours porosity development and the enlargement of pores, which would have a positive effect on gasification reaction rate by enhancing gas diffusion within the solid. The effect of heating rate on char gasification was included in a model previously developed, by correlating the chemical kinetics, particle density and diffusion rate to the char yield, which was selected as a suitable indicator of the heating rate. The new version of the model, considering the variability of heating rate during char formation, was validated through accurate predictions of the experimental results.

Suggested Citation

  • Septien, S. & Escudero Sanz, F.J. & Salvador, S. & Valin, S., 2018. "The effect of pyrolysis heating rate on the steam gasification reactivity of char from woodchips," Energy, Elsevier, vol. 142(C), pages 68-78.
    • Handle: RePEc:eee:energy:v:142:y:2018:i:c:p:68-78
    DOI: 10.1016/j.energy.2017.09.114
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    Cited by:

    1. Gao, Xiaoyan & Zhang, Yaning & Xu, Fei & Yin, Zhaoqin & Wang, Yingying & Bao, Fubing & Li, Bingxi, 2019. "Experimental and kinetic studies on the intrinsic reactivities of rice husk char," Renewable Energy, Elsevier, vol. 135(C), pages 608-616.
    2. Saiman Ding & Efthymios Kantarelis & Klas Engvall, 2020. "Effects of Porous Structure Development and Ash on the Steam Gasification Reactivity of Biochar Residues from a Commercial Gasifier at Different Temperatures," Energies, MDPI, vol. 13(19), pages 1-19, September.
    3. Khiari, Besma & Jeguirim, Mejdi & Limousy, Lionel & Bennici, Simona, 2019. "Biomass derived chars for energy applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 108(C), pages 253-273.
    4. Shengguo Zhao & Liang Ding & Yun Ruan & Bin Bai & Zegang Qiu & Zhiqin Li, 2021. "Experimental and Kinetic Studies on Steam Gasification of a Biomass Char," Energies, MDPI, vol. 14(21), pages 1-23, November.
    5. Stéphane Abanades & Sylvain Rodat & Houssame Boujjat, 2021. "Solar Thermochemical Green Fuels Production: A Review of Biomass Pyro-Gasification, Solar Reactor Concepts and Modelling Methods," Energies, MDPI, vol. 14(5), pages 1-33, March.
    6. Yang, Ke & Wu, Kai & Zhang, Huiyan, 2022. "Machine learning prediction of the yield and oxygen content of bio-oil via biomass characteristics and pyrolysis conditions," Energy, Elsevier, vol. 254(PB).
    7. Dahou, T. & Defoort, F. & Khiari, B. & Labaki, M. & Dupont, C. & Jeguirim, M., 2021. "Role of inorganics on the biomass char gasification reactivity: A review involving reaction mechanisms and kinetics models," Renewable and Sustainable Energy Reviews, Elsevier, vol. 135(C).

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