Assessment of eucalypts wood lignin content by analytical pyrolysis, comparison with Klason and total lignin contents
2021; Taylor & Francis; Volume: 41; Issue: 6 Linguagem: Inglês
10.1080/02773813.2021.1986071
ISSN1532-2319
AutoresAna Alves, Esteban F. Cisneros, Gustavo Balmelli, Susana N. Marcucci Poltri, José Carlos Rodrígues,
Tópico(s)Forest ecology and management
ResumoAnalytical pyrolysis can be used to determine the lignin content (Py-lignin) in eucalypt woods with a precision (0.37%) similar to the wet reference methods. Good correlations were found between the Py-lignin results and Klason (94%) and total lignin contents (95%). Besides apparent species-specific deviations, an average difference of 1.3% compared to the total lignin content was observed, well below the 3.9% difference reported for softwoods (guaiacyl lignin). Since Eucalyptus has more syringyl (S) than guaiacyl (G) units, this suggests that S units are overestimated in comparison to G units by analytical pyrolysis, in line with previous findings for different degradation methods, including pyrolysis.
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