Evaluation of lignins from side-streams generated in an olive tree pruning-based biorefinery Bioethanol production and alkaline pulping
In modern lignocellulosic-based biorefineries, carbohydrates can be transformed into biofuels and pulp and paper, whereas lignin is burned to obtain energy. However, a part of lignin could be converted into value-added products including bio-based aromatic chemicals, as well as building blocks for materials. Then, a good knowledge of lignin is necessary to define its valorisation procedure. This study characterized different lignins from side-streams produced from olive tree pruning bioethanol production (lignins collected from steam explosion pretreatment with water or phosphoric acid as catalysts, followed by simultaneous saccharification and fermentation process) and alkaline pulping (lignins recovered from kraft and soda-AQ black liquors). Together with the chemical composition, the structure of lignins was investigated by FTIR, 13C NMR, and 2D NMR. Bioethanol lignins had clearly distinct characteristics compared to pulping lignins; a certain number of side-chain linkages (mostly alkyl–aryl ether and resinol) accompanied with lower phenolic hydroxyls content. Bioethanol lignins also showed a significant amount of carbohydrates, mainly glucose and protein impurities. By contrast, pulping lignins revealed xylose together with a dramatical reduction of side-chains (some resinol linkages survive) and thereby higher phenol content, indicating rather severe lignin degradation during alkaline pulping processes. All lignins showed a predominance of syringyl units. © 2017 Elsevier B.V.
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Format: | artículo biblioteca |
Language: | English |
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Elsevier
2017
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Subjects: | Lignocellulosic biorefinery, Olive tree pruning, Lignin characterization, |
Online Access: | http://hdl.handle.net/20.500.12792/4211 http://hdl.handle.net/10261/293113 |
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dig-inia-es-10261-2931132023-02-20T07:35:54Z Evaluation of lignins from side-streams generated in an olive tree pruning-based biorefinery Bioethanol production and alkaline pulping Santos, J. I. Fillat Latorre, Úrsula Martín-Sampedro, R. Eugenio Martín, María Eugenia Negro, M. J. Ballesteros, I. Rodríguez, A. Ibarra Trejo, David Lignocellulosic biorefinery Olive tree pruning Lignin characterization In modern lignocellulosic-based biorefineries, carbohydrates can be transformed into biofuels and pulp and paper, whereas lignin is burned to obtain energy. However, a part of lignin could be converted into value-added products including bio-based aromatic chemicals, as well as building blocks for materials. Then, a good knowledge of lignin is necessary to define its valorisation procedure. This study characterized different lignins from side-streams produced from olive tree pruning bioethanol production (lignins collected from steam explosion pretreatment with water or phosphoric acid as catalysts, followed by simultaneous saccharification and fermentation process) and alkaline pulping (lignins recovered from kraft and soda-AQ black liquors). Together with the chemical composition, the structure of lignins was investigated by FTIR, 13C NMR, and 2D NMR. Bioethanol lignins had clearly distinct characteristics compared to pulping lignins; a certain number of side-chain linkages (mostly alkyl–aryl ether and resinol) accompanied with lower phenolic hydroxyls content. Bioethanol lignins also showed a significant amount of carbohydrates, mainly glucose and protein impurities. By contrast, pulping lignins revealed xylose together with a dramatical reduction of side-chains (some resinol linkages survive) and thereby higher phenol content, indicating rather severe lignin degradation during alkaline pulping processes. All lignins showed a predominance of syringyl units. © 2017 Elsevier B.V. 2023-02-20T07:35:54Z 2023-02-20T07:35:54Z 2017 artículo International Journal of Biological Macromolecules 105(1): 238-251 (2017) 0141-8130 http://hdl.handle.net/20.500.12792/4211 http://hdl.handle.net/10261/293113 10.1016/j.ijbiomac.2017.07.030 en none Elsevier |
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Lignocellulosic biorefinery Olive tree pruning Lignin characterization Lignocellulosic biorefinery Olive tree pruning Lignin characterization |
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Lignocellulosic biorefinery Olive tree pruning Lignin characterization Lignocellulosic biorefinery Olive tree pruning Lignin characterization Santos, J. I. Fillat Latorre, Úrsula Martín-Sampedro, R. Eugenio Martín, María Eugenia Negro, M. J. Ballesteros, I. Rodríguez, A. Ibarra Trejo, David Evaluation of lignins from side-streams generated in an olive tree pruning-based biorefinery Bioethanol production and alkaline pulping |
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In modern lignocellulosic-based biorefineries, carbohydrates can be transformed into biofuels and pulp and paper, whereas lignin is burned to obtain energy. However, a part of lignin could be converted into value-added products including bio-based aromatic chemicals, as well as building blocks for materials. Then, a good knowledge of lignin is necessary to define its valorisation procedure. This study characterized different lignins from side-streams produced from olive tree pruning bioethanol production (lignins collected from steam explosion pretreatment with water or phosphoric acid as catalysts, followed by simultaneous saccharification and fermentation process) and alkaline pulping (lignins recovered from kraft and soda-AQ black liquors). Together with the chemical composition, the structure of lignins was investigated by FTIR, 13C NMR, and 2D NMR. Bioethanol lignins had clearly distinct characteristics compared to pulping lignins; a certain number of side-chain linkages (mostly alkyl–aryl ether and resinol) accompanied with lower phenolic hydroxyls content. Bioethanol lignins also showed a significant amount of carbohydrates, mainly glucose and protein impurities. By contrast, pulping lignins revealed xylose together with a dramatical reduction of side-chains (some resinol linkages survive) and thereby higher phenol content, indicating rather severe lignin degradation during alkaline pulping processes. All lignins showed a predominance of syringyl units. © 2017 Elsevier B.V. |
format |
artículo |
topic_facet |
Lignocellulosic biorefinery Olive tree pruning Lignin characterization |
author |
Santos, J. I. Fillat Latorre, Úrsula Martín-Sampedro, R. Eugenio Martín, María Eugenia Negro, M. J. Ballesteros, I. Rodríguez, A. Ibarra Trejo, David |
author_facet |
Santos, J. I. Fillat Latorre, Úrsula Martín-Sampedro, R. Eugenio Martín, María Eugenia Negro, M. J. Ballesteros, I. Rodríguez, A. Ibarra Trejo, David |
author_sort |
Santos, J. I. |
title |
Evaluation of lignins from side-streams generated in an olive tree pruning-based biorefinery Bioethanol production and alkaline pulping |
title_short |
Evaluation of lignins from side-streams generated in an olive tree pruning-based biorefinery Bioethanol production and alkaline pulping |
title_full |
Evaluation of lignins from side-streams generated in an olive tree pruning-based biorefinery Bioethanol production and alkaline pulping |
title_fullStr |
Evaluation of lignins from side-streams generated in an olive tree pruning-based biorefinery Bioethanol production and alkaline pulping |
title_full_unstemmed |
Evaluation of lignins from side-streams generated in an olive tree pruning-based biorefinery Bioethanol production and alkaline pulping |
title_sort |
evaluation of lignins from side-streams generated in an olive tree pruning-based biorefinery bioethanol production and alkaline pulping |
publisher |
Elsevier |
publishDate |
2017 |
url |
http://hdl.handle.net/20.500.12792/4211 http://hdl.handle.net/10261/293113 |
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