Effect of process variables on quality improvement of TGW pulps of Eucalyptus
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/14575 |
Resumo: | High-yield pulps are usually derived from pine wood on account of its anatomical configuration and technology used. Eucalyptus, on the other hand, is a fast-growing species, abundant in many parts of the world, and has thus emerged as an alternative source for many products in the pulp and paper industry. In this particular study, high-yield pulps of Eucalyptus grandis were used. In order to improve their properties, pulps were subjected to chemical treatments with different doses of sodium hydroxide prior to refining (0, 30, 50 and 70 kg/t), at 75°C temperature, 3% consistency, during 1 minute. The refining process was done in a Bauer disc refiner (Regmed) using various refining times (0, 5, 10 and 15 minutes). Results showed that refining with addition of NaOH did bring significant gains to the eucalyptus fibers regarding strength properties, the dose 50 kg/t being found the most suitable. However, other variables associated with refining could also be modified to further improve the strength properties of eucalyptus pulps, including consistency and refining discs configuration. |
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Effect of process variables on quality improvement of TGW pulps of EucalyptusEfeito das variáveis de processo na melhoria da qualidade das polpas TGW de eucaliptoHigh-yield pulpSodium hydroxideRefiningPolpa de alto rendimentoHidróxido de sódioRefinoHigh-yield pulps are usually derived from pine wood on account of its anatomical configuration and technology used. Eucalyptus, on the other hand, is a fast-growing species, abundant in many parts of the world, and has thus emerged as an alternative source for many products in the pulp and paper industry. In this particular study, high-yield pulps of Eucalyptus grandis were used. In order to improve their properties, pulps were subjected to chemical treatments with different doses of sodium hydroxide prior to refining (0, 30, 50 and 70 kg/t), at 75°C temperature, 3% consistency, during 1 minute. The refining process was done in a Bauer disc refiner (Regmed) using various refining times (0, 5, 10 and 15 minutes). Results showed that refining with addition of NaOH did bring significant gains to the eucalyptus fibers regarding strength properties, the dose 50 kg/t being found the most suitable. However, other variables associated with refining could also be modified to further improve the strength properties of eucalyptus pulps, including consistency and refining discs configuration. As polpas de alto rendimento são normalmente produzidas a partir de madeiras de pinus, pela anatomia de seus elementos e da tecnologia estabelecida. Entretanto, em razão do seu rápido crescimento e abundância em muitas partes do mundo, o eucalipto surgiu como uma fonte alternativa para muitos produtos no setor de celulose e papel. Para a realização desse trabalho, foram usadas polpas de alto rendimento de Eucalyptus grandis. Para melhorar suas propriedades, as polpas foram submetidas a tratamentos químicos com hidróxido de sódio em diferentes dosagens antes do refino (0; 30; 50 e 70 kg/t), nas seguintes condições (tempo: 1 minuto; temperatura: 75°C e 3% de consistência). O refino foi realizado em um refinador de discos simples modelo Bauer da Regmed, sendo o tempo de refino variável (0; 5; 10 e 15 minutos). Pelos resultados, as fibras de eucalipto, quando refinadas e submetidas a tratamento químico com NaOH, apresentam ganhos significativos em suas propriedades de resistência, sendo a carga de 50 kg/t a mais indicada segundo esse estudo. Entretanto, outras variáveis associadas ao refino podem ser modificadas de modo a melhorar ainda mais as propriedades de resistência das polpas de eucalipto, como a consistência e configuração dos discos de refino.Universidade Federal de Lavras (UFLA)2016-04-062017-08-01T20:15:18Z2017-08-01T20:15:18Z2017-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfLONGUE JÚNIOR, D. et al. Effect of process variables on quality improvement of TGW pulps of Eucalyptus. CERNE, Lavras, v. 19, n. 4, p. 567-574, out./dez. 2013.http://repositorio.ufla.br/jspui/handle/1/145752317-63420104-7760reponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAenghttp://www.cerne.ufla.br/site/index.php/CERNE/article/view/937/712Copyright (c) 2016 CERNEAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessLongue Júnior, DaltonColodette, Jorge LuizBrumano, Gabriel de Castro BaiãoSilva, Edson Domingos daAlves, Marcos Maurici Araújo2021-04-18T21:19:06Zoai:localhost:1/14575Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2021-04-18T21:19:06Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Effect of process variables on quality improvement of TGW pulps of Eucalyptus Efeito das variáveis de processo na melhoria da qualidade das polpas TGW de eucalipto |
title |
Effect of process variables on quality improvement of TGW pulps of Eucalyptus |
spellingShingle |
Effect of process variables on quality improvement of TGW pulps of Eucalyptus Longue Júnior, Dalton High-yield pulp Sodium hydroxide Refining Polpa de alto rendimento Hidróxido de sódio Refino |
title_short |
Effect of process variables on quality improvement of TGW pulps of Eucalyptus |
title_full |
Effect of process variables on quality improvement of TGW pulps of Eucalyptus |
title_fullStr |
Effect of process variables on quality improvement of TGW pulps of Eucalyptus |
title_full_unstemmed |
Effect of process variables on quality improvement of TGW pulps of Eucalyptus |
title_sort |
Effect of process variables on quality improvement of TGW pulps of Eucalyptus |
author |
Longue Júnior, Dalton |
author_facet |
Longue Júnior, Dalton Colodette, Jorge Luiz Brumano, Gabriel de Castro Baião Silva, Edson Domingos da Alves, Marcos Maurici Araújo |
author_role |
author |
author2 |
Colodette, Jorge Luiz Brumano, Gabriel de Castro Baião Silva, Edson Domingos da Alves, Marcos Maurici Araújo |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Longue Júnior, Dalton Colodette, Jorge Luiz Brumano, Gabriel de Castro Baião Silva, Edson Domingos da Alves, Marcos Maurici Araújo |
dc.subject.por.fl_str_mv |
High-yield pulp Sodium hydroxide Refining Polpa de alto rendimento Hidróxido de sódio Refino |
topic |
High-yield pulp Sodium hydroxide Refining Polpa de alto rendimento Hidróxido de sódio Refino |
description |
High-yield pulps are usually derived from pine wood on account of its anatomical configuration and technology used. Eucalyptus, on the other hand, is a fast-growing species, abundant in many parts of the world, and has thus emerged as an alternative source for many products in the pulp and paper industry. In this particular study, high-yield pulps of Eucalyptus grandis were used. In order to improve their properties, pulps were subjected to chemical treatments with different doses of sodium hydroxide prior to refining (0, 30, 50 and 70 kg/t), at 75°C temperature, 3% consistency, during 1 minute. The refining process was done in a Bauer disc refiner (Regmed) using various refining times (0, 5, 10 and 15 minutes). Results showed that refining with addition of NaOH did bring significant gains to the eucalyptus fibers regarding strength properties, the dose 50 kg/t being found the most suitable. However, other variables associated with refining could also be modified to further improve the strength properties of eucalyptus pulps, including consistency and refining discs configuration. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-04-06 2017-08-01T20:15:18Z 2017-08-01T20:15:18Z 2017-08-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
LONGUE JÚNIOR, D. et al. Effect of process variables on quality improvement of TGW pulps of Eucalyptus. CERNE, Lavras, v. 19, n. 4, p. 567-574, out./dez. 2013. http://repositorio.ufla.br/jspui/handle/1/14575 |
identifier_str_mv |
LONGUE JÚNIOR, D. et al. Effect of process variables on quality improvement of TGW pulps of Eucalyptus. CERNE, Lavras, v. 19, n. 4, p. 567-574, out./dez. 2013. |
url |
http://repositorio.ufla.br/jspui/handle/1/14575 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://www.cerne.ufla.br/site/index.php/CERNE/article/view/937/712 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2016 CERNE Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2016 CERNE Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Lavras (UFLA) |
publisher.none.fl_str_mv |
Universidade Federal de Lavras (UFLA) |
dc.source.none.fl_str_mv |
2317-6342 0104-7760 reponame:Repositório Institucional da UFLA instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Repositório Institucional da UFLA |
collection |
Repositório Institucional da UFLA |
repository.name.fl_str_mv |
Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
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1807835204187848704 |