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The droplet combustion and thermal characteristics of pinewood bio-oil from slow pyrolysis

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  • Yang, S.I.
  • Wu, M.S.

Abstract

The present study investigated the production procedure and combustion characteristics of a bio-oil produced through the slow pyrolysis of pinewood. The combustion properties of droplets with different butanol/bio-oil proportions were thus determined and compared. The droplets containing bio-oil varied irregularly in size during combustion and left considerable residue that was also combusted. The duration of combustion was revealed to increase when the bio-oil concentration was increased. The TGA indicated a two-stage weight loss during combustion. The first stage occurred at 30-160 °C, corresponding to the endothermic evaporation of the light fraction of the compounds after heating. The second stage occurred at 450-650 °C, indicating pyrolytic exothermic residue combustion fed by the macromolecular residue of the interactions between bio-oil constituents. The activation energy was demonstrated to gradually decrease during the evaporation stage and also during the residue combustion stage. The aromatics in the bio-oil polymerized under the intense heat, leading to the formation of residue and soot. The burning rate of the droplet decreased when the bio-oil concentration was increased, whereas the residue burning rate increased with an increase in bio-oil concentration. The volatiles released during residue combustion enhanced the burning rate of residue.

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  • Yang, S.I. & Wu, M.S., 2017. "The droplet combustion and thermal characteristics of pinewood bio-oil from slow pyrolysis," Energy, Elsevier, vol. 141(C), pages 2377-2386.
    • Handle: RePEc:eee:energy:v:141:y:2017:i:c:p:2377-2386
    DOI: 10.1016/j.energy.2017.11.119
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    References listed on IDEAS

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