Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.11/2538
Título: Characterization of cypress wood for kraft pulp production
Autor: Santos, A.J.A.
Anjos, O.
Morais, M.C.
Diogo, G.
Simões, R.
Pereira, H.
Palavras-chave: Cupressus
Cupressus arizonica
Cupressus lusitanica
Cupressus sempervirens
Pulping potential
Extractives
Lignin
Data: 2014
Citação: Santos, A.J. [et al.] (2014) - Characterization of cypress wood for kraft pulp production. BioResources. ISSN 1930-2126 . 9(3). p. 4764-4774.
Resumo: Wood samples of Cupressus arizonica, C. lusitanica, and C. sempervirens were evaluated for chemical, anatomical, and pulp characteristics as raw material for pulp production. Two 17-year-old trees per species were harvested, and wood samples were taken at a height of 2 m. Wood chips from Pinus pinaster (Portugal) and P. sylvestris (Finland) were used as references. C. arizonica differed from C. lusitanica and C. sempervirens with significantly lower (p < 0.05) tracheid diameter and wall thickness in the earlywood. The total extractives contents were 3.9%, 3.3%, and 2.5% for C. lusitanica, C. sempervirens, and C. arizonica, respectively, lower than the 5.1% for P. pinaster and 4.5% for P. sylvestris. Klason lignin content ranged from 33.0 to 35.6%, higher than the 28.0 to 28.7% for the pinewoods. The kraft pulp yields for C. arizonica, C. lusitanica, and C. sempervirens were 37.7%, 36.7%, and 38.7%, respectively, with kappa numbers of 32.0, 31.6, and 28.7, respectively; the yield values were 40.8% and 42.8%, with kappa numbers of 23.4 and 21.0, for P. pinaster and P. sylvestris, respectively. The cypress species are clearly different from pine in relation to wood pulping behavior. Among the cypress, C. sempervirens provided the best pulping results
Peer review: yes
URI: http://hdl.handle.net/10400.11/2538
ISSN: 1930-2126
Versão do Editor: http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_3_4764_Santos_Cypress_Wood_Kraft_Pulp
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