Thermal Decomposition Kinetics of Wood and Bark and Their Torrefied Products

Eszter Barta-Rajnai, Gábor Várhegyi, Liang Wang, Øyvind Skreiberg, Morten Grønli, Zsuzsanna Czégény

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Abstract

The pyrolysis kinetics of Norway spruce, its bark, and their torrefied products was studied. Thermogravimetry (TGA) was employed with linear and stepwise heating programs. Altogether 36 TGA experiments were evaluated simultaneously by the method of least-squares. Part of the kinetic parameters could be assumed common for the studied samples without a considerable worsening of the fit quality. This process results in better defined parameters and emphasizes the similarities between the studied materials. Three pseudocomponents were assumed. Two of them were described by distributed activation energy models (DAEM), while a simpler kinetics was assumed for the pyrolysis of the cellulose content of the samples. The pyrolysis kinetics of the wood and the torrefied wood showed remarkable similarities to the bark and torrefied bark, though essential differences were also observed.

Original languageEnglish
Pages (from-to)4024-4034
Number of pages11
JournalEnergy and Fuels
Volume31
Issue number4
DOIs
Publication statusPublished - Apr 20 2017

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ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

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