Effects of Eucalyptus globulus Wood Autohydrolysis Conditions on the Reaction Products

G. Garrote, M.A. Kabel, H.A. Schols, E. Falque, H. Domingues, J.C. Parajo

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65 Citations (Scopus)

Abstract

Eucalyptus globulus wood samples were reacted in aqueous media (hydrothermal treatments) at 160 °C for 30¿66 min. Liquors from the several experiments were analyzed by spectrophotometry, high-performance liquid chromatography, or gas chromatography¿mass spectrometry for monosaccharides, oligosaccharides, oligosaccharide substituents (arabinose moieties, uronic acids, and acetyl groups), acetic acid, furfural, hydroxymethylfurfural, and dichloromethane-soluble compounds. Individual components of this latter fraction were identified and quantified. The molecular weight distribution of oligosaccharides was studied by high-performance size exclusion chromatography. The kinetics of xylan conversion into high-, medium-, and low-molecular-weight products was assessed in terms of the severity factor and by pseudohomogeneous kinetic models. Keywords: Autohydrolysis; Eucalyptus globulus; product distribution; xylo-oligosaccharides
Original languageEnglish
Pages (from-to)9006-9013
JournalJournal of Agricultural and Food Chemistry
Volume55
Issue number22
DOIs
Publication statusPublished - 2007

Keywords

  • lipophilic extractives
  • chemical-composition
  • kinetic assessment
  • wheat-straw
  • by-products
  • oligosaccharides
  • fractionation
  • liquors
  • water
  • lignocellulosics

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