Wood basic density effect of Eucalyptus grandis in the paper making

ABSTRACT The basic density is the main technical property of the wood due to the fact of the easy determination and correlation with the others wood properties. In this article, it was evaluated wood chips from a five-years-old Eucalyptus grandis in three different silvicultural treatments for pulp...

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Autores: Cremonez,Victor Gonçalves, Bonfatti Junior,Eraldo Antonio, Andrade,Alan Sulato de, Silva,Eliane Lopes da, Klitzke,Ricardo Jorge, Klock,Umberto
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:Brasil
Institución:Matéria (Rio de Janeiro. Online)
Repositorio:Matéria (Rio de Janeiro. Online)
Idioma:inglés
OAI Identifier:oai:scielo:S1517-70762019000300332
Acceso en línea:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762019000300332
Access Level:acceso abierto
Palabra clave:Kraft pulping
pulp bleaching
paper properties
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spelling Wood basic density effect of Eucalyptus grandis in the paper makingKraft pulpingpulp bleachingpaper propertiesABSTRACT The basic density is the main technical property of the wood due to the fact of the easy determination and correlation with the others wood properties. In this article, it was evaluated wood chips from a five-years-old Eucalyptus grandis in three different silvicultural treatments for pulp and paper production. First, a conventional kraft pulping was executed in the same conditions and then submitted to some elemental chlorine free (ECF) bleaching process to achieve the target brightness of 88 ± 1% ISO. The bleached pulps were refined in a Jokro Mill at 0, 2250, 4500 and 6750 revolutions and their physical, mechanical and optical properties were analyzed. The statistical analysis indicated a difference in the wood basic density from the different silvicultural treatments. The yield of the pulping process was not affected by the variation of the wood basic density. The denser wood had the advantage of a lower specific wood consumption while the disadvantage was a greater difficulty in the delignification and a decrease in the selectivity of the pulping process. The denser wood was the one with the best bleachability and the one that most consumed chlorine in the bleaching process. The increase of the wood density caused gains in the fisical and optical properties of the bleached pulp and losses in the mechanical properties.The optical properties of the pulps from denser woods are more resistant than the negative effects of mechanical properties.Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiroem cooperação com a Associação Brasileira do Hidrogênio, ABH22019-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762019000300332Matéria (Rio de Janeiro) v.24 n.3 2019reponame:Matéria (Rio de Janeiro. Online)instname:Matéria (Rio de Janeiro. Online)instacron:RLAM10.1590/s1517-707620190003.0735info:eu-repo/semantics/openAccessengCremonez,Victor GonçalvesBonfatti Junior,Eraldo AntonioAndrade,Alan Sulato deSilva,Eliane Lopes daKlitzke,Ricardo JorgeKlock,Umberto2019-09-11T00:00:00Zoai:scielo:S1517-70762019000300332Revistahttp://www.materia.coppe.ufrj.br/https://old.scielo.br/oai/scielo-oai.php||materia@labh2.coppe.ufrj.br1517-70761517-7076opendoar:2019-09-11T00:00Matéria (Rio de Janeiro. Online) - Matéria (Rio de Janeiro. Online)false
dc.title.none.fl_str_mv Wood basic density effect of Eucalyptus grandis in the paper making
title Wood basic density effect of Eucalyptus grandis in the paper making
spellingShingle Wood basic density effect of Eucalyptus grandis in the paper making
Cremonez,Victor Gonçalves
Kraft pulping
pulp bleaching
paper properties
title_short Wood basic density effect of Eucalyptus grandis in the paper making
title_full Wood basic density effect of Eucalyptus grandis in the paper making
title_fullStr Wood basic density effect of Eucalyptus grandis in the paper making
title_full_unstemmed Wood basic density effect of Eucalyptus grandis in the paper making
title_sort Wood basic density effect of Eucalyptus grandis in the paper making
dc.creator.none.fl_str_mv Cremonez,Victor Gonçalves
Bonfatti Junior,Eraldo Antonio
Andrade,Alan Sulato de
Silva,Eliane Lopes da
Klitzke,Ricardo Jorge
Klock,Umberto
author Cremonez,Victor Gonçalves
author_facet Cremonez,Victor Gonçalves
Bonfatti Junior,Eraldo Antonio
Andrade,Alan Sulato de
Silva,Eliane Lopes da
Klitzke,Ricardo Jorge
Klock,Umberto
author_role author
author2 Bonfatti Junior,Eraldo Antonio
Andrade,Alan Sulato de
Silva,Eliane Lopes da
Klitzke,Ricardo Jorge
Klock,Umberto
author2_role author
author
author
author
author
dc.subject.por.fl_str_mv Kraft pulping
pulp bleaching
paper properties
topic Kraft pulping
pulp bleaching
paper properties
description ABSTRACT The basic density is the main technical property of the wood due to the fact of the easy determination and correlation with the others wood properties. In this article, it was evaluated wood chips from a five-years-old Eucalyptus grandis in three different silvicultural treatments for pulp and paper production. First, a conventional kraft pulping was executed in the same conditions and then submitted to some elemental chlorine free (ECF) bleaching process to achieve the target brightness of 88 ± 1% ISO. The bleached pulps were refined in a Jokro Mill at 0, 2250, 4500 and 6750 revolutions and their physical, mechanical and optical properties were analyzed. The statistical analysis indicated a difference in the wood basic density from the different silvicultural treatments. The yield of the pulping process was not affected by the variation of the wood basic density. The denser wood had the advantage of a lower specific wood consumption while the disadvantage was a greater difficulty in the delignification and a decrease in the selectivity of the pulping process. The denser wood was the one with the best bleachability and the one that most consumed chlorine in the bleaching process. The increase of the wood density caused gains in the fisical and optical properties of the bleached pulp and losses in the mechanical properties.The optical properties of the pulps from denser woods are more resistant than the negative effects of mechanical properties.
publishDate 2019
dc.date.none.fl_str_mv 2019-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762019000300332
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762019000300332
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/s1517-707620190003.0735
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro
em cooperação com a Associação Brasileira do Hidrogênio, ABH2
publisher.none.fl_str_mv Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro
em cooperação com a Associação Brasileira do Hidrogênio, ABH2
dc.source.none.fl_str_mv Matéria (Rio de Janeiro) v.24 n.3 2019
reponame:Matéria (Rio de Janeiro. Online)
instname:Matéria (Rio de Janeiro. Online)
instacron:RLAM
instname_str Matéria (Rio de Janeiro. Online)
instacron_str RLAM
institution RLAM
reponame_str Matéria (Rio de Janeiro. Online)
collection Matéria (Rio de Janeiro. Online)
repository.name.fl_str_mv Matéria (Rio de Janeiro. Online) - Matéria (Rio de Janeiro. Online)
repository.mail.fl_str_mv ||materia@labh2.coppe.ufrj.br
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score 15.300719

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