SANS Analysis of the Microstructural Evolution during the Aging of Pyrolysis Oils from Biomass

Emiliano Fratini, Massimo Bonini, Anja Oasmaa, Yrjö Solantausta, Jose Teixeira, Piero Baglioni

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Abstract

In this paper, we report for the first time a microstructural characterization of pyrolysis oils obtained from biomass. Bio crude oils (BCOs) are good candidates as substitutes for mineral oils as fuels. By using small-angle neutron scattering (SANS), we show that BCOs are nanostructured fluids constituted by a complex continuous phase and nanoparticles mainly formed by the association of units of pyrolytic lignins. The aggregation of these units during the time produces branched structures with fractal dimension Df between 1.4 and 1.5, which are responsible for BCO aging. SANS results fully support the recently formulated thermal ejection theory, accounting for the mechanism of formation of the lignin fraction in oils obtained from fast pyrolysis of biomass.
Original languageEnglish
Pages (from-to)306 - 312
JournalLangmuir
Volume22
Issue number1
DOIs
Publication statusPublished - 2006
MoE publication typeA1 Journal article-refereed

Keywords

  • biofuels
  • liquid biofuels
  • biomass
  • aging
  • lignin
  • pyrolysis
  • fast pyrolysis
  • forest residues
  • wood residues
  • greenhouse gas emissions
  • greenhouse gases
  • climate change
  • SANS

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    Fratini, E., Bonini, M., Oasmaa, A., Solantausta, Y., Teixeira, J., & Baglioni, P. (2006). SANS Analysis of the Microstructural Evolution during the Aging of Pyrolysis Oils from Biomass. Langmuir, 22(1), 306 - 312. https://doi.org/10.1021/la051990a