Effects of autohydrolysis of Eucalyptus urograndis and Eucalyptus grandis on influence of chemical components and crystallinity index

Detalhes bibliográficos
Autor(a) principal: da Silva Morais, Alaine Patrícia [UNESP]
Data de Publicação: 2016
Outros Autores: Sansígolo, Cláudio Angeli [UNESP], de Oliveira Neto, Mario [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1016/j.biortech.2016.04.124
http://hdl.handle.net/11449/172948
Resumo: Samples of Eucalyptus urograndis and Eucalyptus grandis sawdust were autohydrolyzed in aqueous conditions to reach temperatures in the range 110-190 °C and reaction times of 0-150 min in a minireactor. In each minireactor were used a liquor:wood ratio (10:1 L:kg dry wood), in order to assess the effects of the autohydrolysis severity and the crystalline properties of cellulose. The content of extractives, lignin, holocellulose, cellulose, hemicelluloses and crystallinity index obtained from the solid fraction after autohydrolysis of sawdust were determined. This study demonstrated that the hemicelluloses were extensively removed at 170 and 190 °C, whereas cellulose was partly degraded to Eucalyptus urograndis and Eucalyptus grandis sawdust. The lignin content decreased, while the extractives content increased. It was defined that during autohydrolysis, had a slight decreased on crystalline structure of cellulose of Eucalyptus urogandis and Eucalyptus grandis.
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spelling Effects of autohydrolysis of Eucalyptus urograndis and Eucalyptus grandis on influence of chemical components and crystallinity indexAutohydrolysisChemical componentsCrystallinityEucalyptus grandisEucalyptus urograndisSamples of Eucalyptus urograndis and Eucalyptus grandis sawdust were autohydrolyzed in aqueous conditions to reach temperatures in the range 110-190 °C and reaction times of 0-150 min in a minireactor. In each minireactor were used a liquor:wood ratio (10:1 L:kg dry wood), in order to assess the effects of the autohydrolysis severity and the crystalline properties of cellulose. The content of extractives, lignin, holocellulose, cellulose, hemicelluloses and crystallinity index obtained from the solid fraction after autohydrolysis of sawdust were determined. This study demonstrated that the hemicelluloses were extensively removed at 170 and 190 °C, whereas cellulose was partly degraded to Eucalyptus urograndis and Eucalyptus grandis sawdust. The lignin content decreased, while the extractives content increased. It was defined that during autohydrolysis, had a slight decreased on crystalline structure of cellulose of Eucalyptus urogandis and Eucalyptus grandis.Laboratório de Celulose e Papel Departamento de Ciência Florestal Faculdade de Ciências Agronômicas/UNESP, Faz Experimental Lageado, Jose Barbosa de Barros, 1780Departamento de Física e Biofísica Instituto de Biociências UNESP, Distrito de Rubião Júnior, S/NLaboratório de Celulose e Papel Departamento de Ciência Florestal Faculdade de Ciências Agronômicas/UNESP, Faz Experimental Lageado, Jose Barbosa de Barros, 1780Departamento de Física e Biofísica Instituto de Biociências UNESP, Distrito de Rubião Júnior, S/NUniversidade Estadual Paulista (Unesp)da Silva Morais, Alaine Patrícia [UNESP]Sansígolo, Cláudio Angeli [UNESP]de Oliveira Neto, Mario [UNESP]2018-12-11T17:02:51Z2018-12-11T17:02:51Z2016-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article623-628application/pdfhttp://dx.doi.org/10.1016/j.biortech.2016.04.124Bioresource Technology, v. 214, p. 623-628.1873-29760960-8524http://hdl.handle.net/11449/17294810.1016/j.biortech.2016.04.1242-s2.0-849668742802-s2.0-84966874280.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBioresource Technology2,029info:eu-repo/semantics/openAccess2024-04-30T13:11:27Zoai:repositorio.unesp.br:11449/172948Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:38:12.658415Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Effects of autohydrolysis of Eucalyptus urograndis and Eucalyptus grandis on influence of chemical components and crystallinity index
title Effects of autohydrolysis of Eucalyptus urograndis and Eucalyptus grandis on influence of chemical components and crystallinity index
spellingShingle Effects of autohydrolysis of Eucalyptus urograndis and Eucalyptus grandis on influence of chemical components and crystallinity index
da Silva Morais, Alaine Patrícia [UNESP]
Autohydrolysis
Chemical components
Crystallinity
Eucalyptus grandis
Eucalyptus urograndis
title_short Effects of autohydrolysis of Eucalyptus urograndis and Eucalyptus grandis on influence of chemical components and crystallinity index
title_full Effects of autohydrolysis of Eucalyptus urograndis and Eucalyptus grandis on influence of chemical components and crystallinity index
title_fullStr Effects of autohydrolysis of Eucalyptus urograndis and Eucalyptus grandis on influence of chemical components and crystallinity index
title_full_unstemmed Effects of autohydrolysis of Eucalyptus urograndis and Eucalyptus grandis on influence of chemical components and crystallinity index
title_sort Effects of autohydrolysis of Eucalyptus urograndis and Eucalyptus grandis on influence of chemical components and crystallinity index
author da Silva Morais, Alaine Patrícia [UNESP]
author_facet da Silva Morais, Alaine Patrícia [UNESP]
Sansígolo, Cláudio Angeli [UNESP]
de Oliveira Neto, Mario [UNESP]
author_role author
author2 Sansígolo, Cláudio Angeli [UNESP]
de Oliveira Neto, Mario [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv da Silva Morais, Alaine Patrícia [UNESP]
Sansígolo, Cláudio Angeli [UNESP]
de Oliveira Neto, Mario [UNESP]
dc.subject.por.fl_str_mv Autohydrolysis
Chemical components
Crystallinity
Eucalyptus grandis
Eucalyptus urograndis
topic Autohydrolysis
Chemical components
Crystallinity
Eucalyptus grandis
Eucalyptus urograndis
description Samples of Eucalyptus urograndis and Eucalyptus grandis sawdust were autohydrolyzed in aqueous conditions to reach temperatures in the range 110-190 °C and reaction times of 0-150 min in a minireactor. In each minireactor were used a liquor:wood ratio (10:1 L:kg dry wood), in order to assess the effects of the autohydrolysis severity and the crystalline properties of cellulose. The content of extractives, lignin, holocellulose, cellulose, hemicelluloses and crystallinity index obtained from the solid fraction after autohydrolysis of sawdust were determined. This study demonstrated that the hemicelluloses were extensively removed at 170 and 190 °C, whereas cellulose was partly degraded to Eucalyptus urograndis and Eucalyptus grandis sawdust. The lignin content decreased, while the extractives content increased. It was defined that during autohydrolysis, had a slight decreased on crystalline structure of cellulose of Eucalyptus urogandis and Eucalyptus grandis.
publishDate 2016
dc.date.none.fl_str_mv 2016-08-01
2018-12-11T17:02:51Z
2018-12-11T17:02:51Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1016/j.biortech.2016.04.124
Bioresource Technology, v. 214, p. 623-628.
1873-2976
0960-8524
http://hdl.handle.net/11449/172948
10.1016/j.biortech.2016.04.124
2-s2.0-84966874280
2-s2.0-84966874280.pdf
url http://dx.doi.org/10.1016/j.biortech.2016.04.124
http://hdl.handle.net/11449/172948
identifier_str_mv Bioresource Technology, v. 214, p. 623-628.
1873-2976
0960-8524
10.1016/j.biortech.2016.04.124
2-s2.0-84966874280
2-s2.0-84966874280.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Bioresource Technology
2,029
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 623-628
application/pdf
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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