Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/5553
Título: Analytical pyrolysis as a direct method to determine the lignin content in wood. Part 2: evaluation of the common model and the influence of compression wood
Autor: Alves, Ana
Rodrigues, José
Wimmer, Rupert
Schwanninger, Manfred
Palavras-chave: analytical pyrolysis
compression wood
Klason lignin
Larix sp.
Pinus pinaster
Picea abies
Data: 2008
Editora: Elsevier
Citação: "Journal of Analytical and Applied Pyrolysis". ISSN 0165-2370. 81(2008)167-172
Resumo: In Part 1, a method for the quantification of the lignin content (Py-lignin) of Maritime pine and spruce wood samples directly from the pyrograms was presented (A. Alves, M. Schwanninger, H. Pereira, J. Rodrigues, J. Anal. Appl. Pyrol. 76 (2006a) 209). The good correlation found between the Py-lignin and Klason lignin content gave a common model to both species. In this work different larch species (Larix sp.) as well as varieties of European larch were used to evaluate this common model, revealing only small differences between the measured and the predicted Klason lignin contents. Compression wood was included due to the difference in lignin composition and content compared to normal wood. As the influence of compression wood was small a so-called ‘‘softwood model’’ including all samples was calculated (Py-lignin = 0.7325 Klason lignin + 3.9195, R2 = 0.94). This can be used for pine, larch, and spruce wood with the limitation of the highest and lowest values where the species-specific models lead to better results, although more than 95% of the differences between the species-specific models and the ‘‘softwood model’’ lie within 0.3%. It is expected that this model can predict the Klason lignin content of other softwoods.
Peer review: yes
URI: http://hdl.handle.net/10400.5/5553
ISSN: 0165-2370
Versão do Editor: www.elsevier.com/locate/jaap
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