Analytical pyrolysis study of biodelignification of cloned Eucalyptus globulus (EG) clone and Pinus pinaster Aiton kraft pulp and residual lignins

Atika Oudia, E. Mészáros, E. Jakab, Rogério Simões, João Queiroz, Arthur Ragauskas, L. Novák

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

This study centred on the analysis of lignin in situ of cloned eucalypt and pine kraft pulps. Trametes versicolor laccase-violuric acid system (LMS) delignifications were performed on a softwood (Pinus pinaster) and a hardwood (Eucalyptus globulus) conventional kraft pulp with an initial kappa number of 34.5 and 15.5, respectively. The LMS treated pulps were then subjected to alkaline extraction stages (E). The kappa number data show that LMS is effective at biodelignifying both softwood and hardwood kraft pulps. However, under the conditions employed in this study, a greater level of biodelignification was obtained with LMS E. globulus (hardwood) than with LMS P. pinaster (softwood), but the amount of lignin removed was higher for the softwood pulp. The original milled wood samples, kraft pulps, biodelignified kraft pulps, and isolated residual lignin and milled wood lignins from the two wood samples have been characterized by pyrolysis-gas chromatography/mass spectrometry. The analysis of the pyrograms indicates that the lignin compositions of the two wood species and corresponding pulps are very different, as expected; however, the knowledge of the chemical mechanisms of delignification is very limited and requires additional work. Analytical pyrolysis is one the few degradative methods for the analysis of biopolymers that has shown a sufficient degree of success.

Original languageEnglish
Pages (from-to)19-29
Number of pages11
JournalJournal of Analytical and Applied Pyrolysis
Volume85
Issue number1-2
DOIs
Publication statusPublished - May 2009

Fingerprint

Kraft pulp
Lignin
Softwoods
Pyrolysis
Hardwoods
Wood
Pulp
Delignification
Laccase
Biopolymers
Gas chromatography
Mass spectrometry
Acids
Chemical analysis

Keywords

  • Cloned Eucalyptus globulus
  • Kraft pulp
  • Laccase
  • Pinus pinaster
  • Pyrolysis
  • Violuric acid

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Analytical pyrolysis study of biodelignification of cloned Eucalyptus globulus (EG) clone and Pinus pinaster Aiton kraft pulp and residual lignins. / Oudia, Atika; Mészáros, E.; Jakab, E.; Simões, Rogério; Queiroz, João; Ragauskas, Arthur; Novák, L.

In: Journal of Analytical and Applied Pyrolysis, Vol. 85, No. 1-2, 05.2009, p. 19-29.

Research output: Contribution to journalArticle

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