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Fractionation of liquid products from pyrolysis of lignocellulosic biomass by stepwise thermal treatment

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  • Persson, H.
  • Han, T.
  • Sandström, L.
  • Xia, W.
  • Evangelopoulos, P.
  • Yang, W.

Abstract

The thermal properties of cellulose, hemicellulose and lignin can be utilized to improve the characteristics of pyrolysis liquids. In this study, a concept of stepwise pyrolysis to fractionate the liquid based on the thermal properties of the biomass constituents was investigated. Lignocellulosic biomass was thermally treated in two steps: 200–300 °C followed by 550 °C. Derived liquids were studied for GC/MS analysis, water content, acid concentration and a solvent extraction method. Pyrolytic liquid derived from 550 °C after treatment at lower temperatures have a higher relative composition of phenolic compounds compared to one-step pyrolysis (increased from 58 to 90% of GC/MS peak area). Also, compounds known to promote aging, such as acids and carbonyl compounds, are derived at lower temperatures which may suppress aging in the liquid derived downstream at 550 °C. For liquids derived at 550 °C, the total acid number was reduced from 125 in one-step treatment to 14 in two-step treatment. Overall, no significant difference in the total liquid yield (sum of the liquids derived in separated treatments) nor any variations in their collective composition compared to one-step treatment at 550 °C was observed, i.e. stepwise pyrolysis can be utilized for direct fractionation of pyrolytic vapors.

Suggested Citation

  • Persson, H. & Han, T. & Sandström, L. & Xia, W. & Evangelopoulos, P. & Yang, W., 2018. "Fractionation of liquid products from pyrolysis of lignocellulosic biomass by stepwise thermal treatment," Energy, Elsevier, vol. 154(C), pages 346-351.
    • Handle: RePEc:eee:energy:v:154:y:2018:i:c:p:346-351
    DOI: 10.1016/j.energy.2018.04.150
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    Cited by:

    1. Mesfun, Sennai & Leduc, Sylvain & Patrizio, Piera & Wetterlund, Elisabeth & Mendoza-Ponce, Alma & Lammens, Tijs & Staritsky, Igor & Elbersen, Berien & Lundgren, Joakim & Kraxner, Florian, 2018. "Spatio-temporal assessment of integrating intermittent electricity in the EU and Western Balkans power sector under ambitious CO2 emission policies," Energy, Elsevier, vol. 164(C), pages 676-693.
    2. Wang, Shule & Wen, Yuming & Hammarström, Henry & Jönsson, Pär Göran & Yang, Weihong, 2021. "Pyrolysis behaviour, kinetics and thermodynamic data of hydrothermal carbonization–Treated pulp and paper mill sludge," Renewable Energy, Elsevier, vol. 177(C), pages 1282-1292.
    3. Simone Marzeddu & Andrea Cappelli & Andrea Ambrosio & María Alejandra Décima & Paolo Viotti & Maria Rosaria Boni, 2021. "A Life Cycle Assessment of an Energy-Biochar Chain Involving a Gasification Plant in Italy," Land, MDPI, vol. 10(11), pages 1-29, November.
    4. Zhang, Zhikun & Zhu, Zongyuan & Shen, Boxiong & Liu, Lina, 2019. "Insights into biochar and hydrochar production and applications: A review," Energy, Elsevier, vol. 171(C), pages 581-598.
    5. Jung, Jong-Min & Kim, Sok & Lee, Jechan & Oh, Jeong Ik & Choi, Yoon-E. & Kwon, Eilhann E., 2019. "Tailoring pyrogenic products from pyrolysis of defatted Euglena gracilis using CO2 as reactive gas medium," Energy, Elsevier, vol. 174(C), pages 184-190.

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