Assessment of eucalypts wood lignin content by analytical pyrolysis, comparison with Klason and total lignin contents. (5th November 2021)

• Record Type: Journal Article
• Authors: Alves, A.; Cisneros, E. F.; Balmelli, G.; Poltri, S. N. Marcucci; Rodrigues, J.
• Is Part Of: Journal of wood chemistry and technology. Volume 41:Number 6(2021)
• Page Start: 229
• Page End: 235
• Publication Date: 2021-11-05
• Subjects: Eucalyptus genus -- total lignin -- Klason lignin -- Py-lignin; Wood -- Chemistry -- Periodicals; Wood; Wood -- Chemistry; Periodicals; 674.13
• DOI: 10.1080/02773813.2021.1986071
• Languages: English
• ISSNs: 0277-3813

Abstract

Abstract: Analytical 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.