Development and characterization of an environmentallyfriendly process sequence (autohydrolysis and organosolv) for wheat straw delignification
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/16841 |
Resumo: | The present work describes the delignification of wheat straw through an environmentally friendly process resulting from sequential application of autohydrolysis and organosolv processes. Wheat straw autohydrolysis was performed at 180°C during 30 min with a liquid–solid ratio of 10 (v/w); under these conditions, a solubilization of 44% of the original xylan, with 78% of sugars as xylooligosaccharides of the sum of sugars solubilized in the autohydrolysis liquors generated by the hemicellulose fraction hydrolysis. The corresponding solid fraction enrichment with 63.7% of glucan and 7.55% of residual xylan was treated with a 40% ethanol and 0.1% NaOH aqueous solution at a liquid–solid ratio of 10 (v/w), with the best results obtained at 180°C during 20 min. The highest lignin recovery, measured by acid precipitation of the extracted lignin, was 3.25 g/100 ml. The lignin obtained by precipitation was characterized by FTIR, and the crystallinity indexes from the native cellulose, the cellulose recovered after autohydrolysis, and the cellulose obtained after applying the organosolv process were obtained by X-ray diffraction, returning values of 21.32%, 55.17%, and 53.59%, respectively. Visualization of the fibers was done for all the processing steps using scanning electron microscopy. |
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Development and characterization of an environmentallyfriendly process sequence (autohydrolysis and organosolv) for wheat straw delignificationOrganosolv processDelignificationWheat strawAutohydrolysisExtractionScience & TechnologyThe present work describes the delignification of wheat straw through an environmentally friendly process resulting from sequential application of autohydrolysis and organosolv processes. Wheat straw autohydrolysis was performed at 180°C during 30 min with a liquid–solid ratio of 10 (v/w); under these conditions, a solubilization of 44% of the original xylan, with 78% of sugars as xylooligosaccharides of the sum of sugars solubilized in the autohydrolysis liquors generated by the hemicellulose fraction hydrolysis. The corresponding solid fraction enrichment with 63.7% of glucan and 7.55% of residual xylan was treated with a 40% ethanol and 0.1% NaOH aqueous solution at a liquid–solid ratio of 10 (v/w), with the best results obtained at 180°C during 20 min. The highest lignin recovery, measured by acid precipitation of the extracted lignin, was 3.25 g/100 ml. The lignin obtained by precipitation was characterized by FTIR, and the crystallinity indexes from the native cellulose, the cellulose recovered after autohydrolysis, and the cellulose obtained after applying the organosolv process were obtained by X-ray diffraction, returning values of 21.32%, 55.17%, and 53.59%, respectively. Visualization of the fibers was done for all the processing steps using scanning electron microscopy.The authors thank Professor Juan Carlos Parajo from University of Vigo, for the assistance in the materials preparation under autohydrolysis process as well as the ALBAN program for the PhD fellowship support.Humana PressUniversidade do MinhoRuiz, Héctor A.Ruzene, Denise S.Silva, Daniel Pereira daSilva, Fernando F. Macieira daVicente, A. A.Teixeira, J. A.20112011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/16841eng0273-228910.1007/s12010-011-9163-921274658http://www.springerlink.com/info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:27:44Zoai:repositorium.sdum.uminho.pt:1822/16841Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:22:26.984847Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Development and characterization of an environmentallyfriendly process sequence (autohydrolysis and organosolv) for wheat straw delignification |
title |
Development and characterization of an environmentallyfriendly process sequence (autohydrolysis and organosolv) for wheat straw delignification |
spellingShingle |
Development and characterization of an environmentallyfriendly process sequence (autohydrolysis and organosolv) for wheat straw delignification Ruiz, Héctor A. Organosolv process Delignification Wheat straw Autohydrolysis Extraction Science & Technology |
title_short |
Development and characterization of an environmentallyfriendly process sequence (autohydrolysis and organosolv) for wheat straw delignification |
title_full |
Development and characterization of an environmentallyfriendly process sequence (autohydrolysis and organosolv) for wheat straw delignification |
title_fullStr |
Development and characterization of an environmentallyfriendly process sequence (autohydrolysis and organosolv) for wheat straw delignification |
title_full_unstemmed |
Development and characterization of an environmentallyfriendly process sequence (autohydrolysis and organosolv) for wheat straw delignification |
title_sort |
Development and characterization of an environmentallyfriendly process sequence (autohydrolysis and organosolv) for wheat straw delignification |
author |
Ruiz, Héctor A. |
author_facet |
Ruiz, Héctor A. Ruzene, Denise S. Silva, Daniel Pereira da Silva, Fernando F. Macieira da Vicente, A. A. Teixeira, J. A. |
author_role |
author |
author2 |
Ruzene, Denise S. Silva, Daniel Pereira da Silva, Fernando F. Macieira da Vicente, A. A. Teixeira, J. A. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Ruiz, Héctor A. Ruzene, Denise S. Silva, Daniel Pereira da Silva, Fernando F. Macieira da Vicente, A. A. Teixeira, J. A. |
dc.subject.por.fl_str_mv |
Organosolv process Delignification Wheat straw Autohydrolysis Extraction Science & Technology |
topic |
Organosolv process Delignification Wheat straw Autohydrolysis Extraction Science & Technology |
description |
The present work describes the delignification of wheat straw through an environmentally friendly process resulting from sequential application of autohydrolysis and organosolv processes. Wheat straw autohydrolysis was performed at 180°C during 30 min with a liquid–solid ratio of 10 (v/w); under these conditions, a solubilization of 44% of the original xylan, with 78% of sugars as xylooligosaccharides of the sum of sugars solubilized in the autohydrolysis liquors generated by the hemicellulose fraction hydrolysis. The corresponding solid fraction enrichment with 63.7% of glucan and 7.55% of residual xylan was treated with a 40% ethanol and 0.1% NaOH aqueous solution at a liquid–solid ratio of 10 (v/w), with the best results obtained at 180°C during 20 min. The highest lignin recovery, measured by acid precipitation of the extracted lignin, was 3.25 g/100 ml. The lignin obtained by precipitation was characterized by FTIR, and the crystallinity indexes from the native cellulose, the cellulose recovered after autohydrolysis, and the cellulose obtained after applying the organosolv process were obtained by X-ray diffraction, returning values of 21.32%, 55.17%, and 53.59%, respectively. Visualization of the fibers was done for all the processing steps using scanning electron microscopy. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011 2011-01-01T00:00:00Z |
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://hdl.handle.net/1822/16841 |
url |
http://hdl.handle.net/1822/16841 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0273-2289 10.1007/s12010-011-9163-9 21274658 http://www.springerlink.com/ |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Humana Press |
publisher.none.fl_str_mv |
Humana Press |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799132694773235712 |