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Thermal pretreatment of wood (Lauan) block by torrefaction and its influence on the properties of the biomass

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  • Chen, Wei-Hsin
  • Hsu, Huan-Chun
  • Lu, Ke-Miao
  • Lee, Wen-Jhy
  • Lin, Ta-Chang

Abstract

The purpose of this study is to investigate the torrefaction behavior of woody biomass (Lauan) blocks and its influence on the properties of the wood. Three different torrefaction temperatures of 220, 250 and 280 °C, corresponding to light, mild and severe torrefactions, and four torrefaction times of 0.5, 1, 1.5 and 2 h were considered. After analyzing the torrefied woods, it was found that the torrefaction temperature of 280 °C was able to increase the calorific value of the wood up to 40%. However, over 50% of weight was lost from the wood. The grindability of the torrefied wood could be improved in a significant way if the torrefaction temperature was as high as 250 °C and the torrefaction time longer than 1 h. Therefore, the torrefaction temperature of 250 °C along with the torrefaction time longer than 1 h was the recommended operation to intensify the heating value and grindability as well as to avoid too much mass loss of the wood. This study also suggested that over 50% of the reacted wood was converted into condensed liquid. The main components in the liquid were monoaromatics; little amount of heterocyclic hydrocarbons were also obtained from the torrefactions, especially at the torrefaction temperature of 280 °C.

Suggested Citation

  • Chen, Wei-Hsin & Hsu, Huan-Chun & Lu, Ke-Miao & Lee, Wen-Jhy & Lin, Ta-Chang, 2011. "Thermal pretreatment of wood (Lauan) block by torrefaction and its influence on the properties of the biomass," Energy, Elsevier, vol. 36(5), pages 3012-3021.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:5:p:3012-3021
    DOI: 10.1016/j.energy.2011.02.045
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    References listed on IDEAS

    as
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