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Effect of inorganic salts / lignin on the combustion performance of torrefied biochar

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  • Zhang, Yan
  • Zhao, Zhihong
  • Xing, Dong
  • Hu, Jianpeng
  • Liu, Wenjing
  • Wang, Xue
  • Yao, Lihong

Abstract

In this study, inorganic salts (KMnO4, Ba(NO3)2) and enzymolysis lignin were added into torrefied biochar to improve the drawback of high ignition temperature during combustion when biomass underwent torrefaction. Weight loss characteristics, gas products, combustion kinetics of torrefied biochar with different additives were investigated. The addition of KMnO4, Ba(NO3)2, enzymolysis lignin, and their blends can reduce the ignition point of torrefied biochar, and the addition of Ba(NO3)2 can also extent the burnout time. When KMnO4, Ba(NO3)2 and lignin were added at the same time, the first weight loss peak temperature was reduced, and the reaction rate was accelerated. The combustion kinetics of torrefied biochar with different inorganic salts/lignin can be described by a simple first-order reaction. The addition of different inorganic salts/lignin additives is beneficial to reduce the activation energy of the low temperature reaction stage, and the activation energy of torrefied biochar with lignin addition decreases the most.

Suggested Citation

  • Zhang, Yan & Zhao, Zhihong & Xing, Dong & Hu, Jianpeng & Liu, Wenjing & Wang, Xue & Yao, Lihong, 2024. "Effect of inorganic salts / lignin on the combustion performance of torrefied biochar," Energy, Elsevier, vol. 293(C).
    • Handle: RePEc:eee:energy:v:293:y:2024:i:c:s0360544224004791
    DOI: 10.1016/j.energy.2024.130707
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    References listed on IDEAS

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    Keywords

    KMnO4; Ba(NO3)2; Lignin; Combustion kinetics; Oxidizer;
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