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Open Access item Ease of delignification assesment of wood from different Eucalyptus species by pyrolysis (TMAH)-GC/MS and CP/MAS 13C-NMR spectrometry

Authors:González-Vila, Francisco Javier
Almendros, G.
Río Andrade, José Carlos del
Martín Martínez, Francisco
Gutiérrez Suárez, Ana
Romero Sánchez, Javier
Keywords:Eucalypt, Pyrolysis, S/G ratio, Ease of delignification, CP/MAS 13C-NMR spectrometry, TMAH, E. globulus, E. grandis, E. camaldulensis
Issue Date:1999
Citation:Journal of Analytical and Applied Pyrolysis 49:295-305 (1999)
Abstract:Flash-pyrolysis in the presence of tetramethylammonium hydroxide (TMAH) of woods from different species of Eucalyptus yields series of guaiacyl-type (G) and syringyl-type (S) units in slightly but characteristically different relative proportions. Such differences have been used to suggest a fine and appropriate index of the ease of delignification of the different Eucalyptus species when pulped by the Kraft process. The pyrolytic data were in agreement with those obtained from CP/MAS 13C-NMR spectra of the woods. On the other hand, the various eucalypt woods showed additional differences in their pyrolytic patterns regarding the relative amounts and structure of the high molecular weight aromatic compounds arising from the pyrolysis of polyphenolic wood constituents, which might be used as a basis for chemotaxonomic differentiation of the origin of the woods.
Description:11 pages, 5 figures, 3 tables, 18 references. Enlazamos a la presentación a congreso: http://hdl.handle.net/10261/55044.
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