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Effect of Evolution of Carbon Structure during Torrefaction in Woody Biomass on Thermal Degradation

Author

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  • Peng Liu

    (National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Institute of Urban and Rural Mining, Changzhou University, Changzhou 213164, China
    Changzhou Key Laboratory of Biomass Green-Safe & High Value Utilization Technology, Changzhou 213164, China)

  • Panpan Lang

    (National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Institute of Urban and Rural Mining, Changzhou University, Changzhou 213164, China
    Changzhou Key Laboratory of Biomass Green-Safe & High Value Utilization Technology, Changzhou 213164, China)

  • Ailing Lu

    (Changzhou Key Laboratory of Biomass Green-Safe & High Value Utilization Technology, Changzhou 213164, China)

  • Yanling Li

    (National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Institute of Urban and Rural Mining, Changzhou University, Changzhou 213164, China
    Changzhou Key Laboratory of Biomass Green-Safe & High Value Utilization Technology, Changzhou 213164, China)

  • Xueqin Li

    (National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Institute of Urban and Rural Mining, Changzhou University, Changzhou 213164, China
    Changzhou Key Laboratory of Biomass Green-Safe & High Value Utilization Technology, Changzhou 213164, China)

  • Tanglei Sun

    (National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Institute of Urban and Rural Mining, Changzhou University, Changzhou 213164, China
    Changzhou Key Laboratory of Biomass Green-Safe & High Value Utilization Technology, Changzhou 213164, China)

  • Yantao Yang

    (National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Institute of Urban and Rural Mining, Changzhou University, Changzhou 213164, China
    Changzhou Key Laboratory of Biomass Green-Safe & High Value Utilization Technology, Changzhou 213164, China)

  • Hui Li

    (State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410004, China)

  • Tingzhou Lei

    (National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Institute of Urban and Rural Mining, Changzhou University, Changzhou 213164, China
    Changzhou Key Laboratory of Biomass Green-Safe & High Value Utilization Technology, Changzhou 213164, China)

Abstract

Torrefaction is an effective method for upgrading biomass. Cedar torrefaction is carried out in a fixed bed reactor at the temperature of 200–300 °C. The structural parameters are obtained from elemental analysis and 13 C nuclear magnetic resonance (NMR). Thermal degradation behavior of raw and torrefied cedar is monitored by thermogravimetry analysis. The results show that carbon structure varied during torrefaction has a significant effect on thermal degradation of cedar. Some unstable oxygen functional groups, such as C1 of hemicellulose, β-O-4 linked bonds, and amorphous C6 of cellulose, are decomposed at mild torrefaction of torrefied temperature ≤ 200 °C. The temperature of maximum weight loss rate increases from 348 °C of raw cedar to 373 °C of C-200. The amorphous cellulose is partly re-crystallized at moderate torrefaction of torrefied temperature 200–250 °C. The aromaticity of torrefied cedar increases from 0.45 of C-200 to 0.73 of C-250. The covalent bond in the side chain of aromatic rings in cedar was further broken during torrefaction at severe torrefaction of torrefied temperature 250–300 °C. The area percentage of DTG mainly signed at 387 °C of C-300. The proton aromatic carbon increases from 12.35% of C-250 to 21.69% of C-300. These results will further facilitate the utilization of biomass for replacing fossil fuel to drive carbon neutrality.

Suggested Citation

  • Peng Liu & Panpan Lang & Ailing Lu & Yanling Li & Xueqin Li & Tanglei Sun & Yantao Yang & Hui Li & Tingzhou Lei, 2022. "Effect of Evolution of Carbon Structure during Torrefaction in Woody Biomass on Thermal Degradation," IJERPH, MDPI, vol. 19(24), pages 1-11, December.
  • Handle: RePEc:gam:jijerp:v:19:y:2022:i:24:p:16831-:d:1003990
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    References listed on IDEAS

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    1. Song, Yintao & Chen, Zhuo & Li, Yanling & Sun, Tanglei & Huhetaoli, & Lei, Tingzhou & Liu, Peng, 2024. "Regulation of energy properties and thermal behavior of bio-coal from lignocellulosic biomass using torrefaction," Energy, Elsevier, vol. 289(C).

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