Characterization of coffee (Coffea arabica) husk lignin and degradation products obtained after oxygen and alkali addition
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.biortech.2018.01.041 http://hdl.handle.net/11449/170725 |
Resumo: | The full use of biomass in future biorefineries has stimulated studies on utilization of lignin from agricultural crops, such as coffee husk, a major residue from coffee processing. This study focuses on characterizing the lignin obtained from coffee husk and its further wet oxidation products as a function of alkali loading, temperature and residence time. The lignin fraction after diluted acid and alkali pretreatments is composed primarily of p-hydroxylphenyl units (≥49%), with fewer guaiacyl and syringyl units. Linkages appear to be mainly β-O-4 ether linkages. Thermal degradation of pretreated lignin during wet oxidation occurred in two stages. Carboxylic acids were the main degradation product. Due to the condensed structure of this lignin, relatively low yields of aromatic aldehydes were achieved, except with temperatures over 210 °C, 5 min residence time and 11.7 wt% NaOH. Optimization of the pretreatment and oxidation parameters are important to maximizing yield of high-value bioproducts from lignin. |
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Characterization of coffee (Coffea arabica) husk lignin and degradation products obtained after oxygen and alkali additionAlkaline conditionsBiorefineryCoffee huskLigninWet oxidationThe full use of biomass in future biorefineries has stimulated studies on utilization of lignin from agricultural crops, such as coffee husk, a major residue from coffee processing. This study focuses on characterizing the lignin obtained from coffee husk and its further wet oxidation products as a function of alkali loading, temperature and residence time. The lignin fraction after diluted acid and alkali pretreatments is composed primarily of p-hydroxylphenyl units (≥49%), with fewer guaiacyl and syringyl units. Linkages appear to be mainly β-O-4 ether linkages. Thermal degradation of pretreated lignin during wet oxidation occurred in two stages. Carboxylic acids were the main degradation product. Due to the condensed structure of this lignin, relatively low yields of aromatic aldehydes were achieved, except with temperatures over 210 °C, 5 min residence time and 11.7 wt% NaOH. Optimization of the pretreatment and oxidation parameters are important to maximizing yield of high-value bioproducts from lignin.Biotechnology Department Engineering School of Lorena University of São PauloBioproducts Sciences and Engineering Laboratory Washington State University, Tri-CitiesCenter for NMR Spectroscopy Washington State UniversityWilliam R. Wiley Environmental Molecular Sciences Laboratory Pacific Northwest National LaboratoryVoiland School of Chemical and Bioengineering and Biological Systems Engineering Washington State UniversityCo-author currently works in Bioenergy Research Institute UNESPCo-author currently works in Bioenergy Research Institute UNESPUniversidade de São Paulo (USP)Washington State UniversityPacific Northwest National LaboratoryUniversidade Estadual Paulista (Unesp)de Carvalho Oliveira, FernandaSrinivas, KeerthiHelms, Gregory L.Isern, Nancy G.Cort, John R.Gonçalves, Adilson Roberto [UNESP]Ahring, Birgitte Kiær2018-12-11T16:52:10Z2018-12-11T16:52:10Z2018-06-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article172-180http://dx.doi.org/10.1016/j.biortech.2018.01.041Bioresource Technology, v. 257, p. 172-180.1873-29760960-8524http://hdl.handle.net/11449/17072510.1016/j.biortech.2018.01.0412-s2.0-8504269503125044450105426310000-0001-8462-4619Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBioresource Technology2,029info:eu-repo/semantics/openAccess2021-10-23T17:09:41Zoai:repositorio.unesp.br:11449/170725Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:10:23.434493Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Characterization of coffee (Coffea arabica) husk lignin and degradation products obtained after oxygen and alkali addition |
title |
Characterization of coffee (Coffea arabica) husk lignin and degradation products obtained after oxygen and alkali addition |
spellingShingle |
Characterization of coffee (Coffea arabica) husk lignin and degradation products obtained after oxygen and alkali addition de Carvalho Oliveira, Fernanda Alkaline conditions Biorefinery Coffee husk Lignin Wet oxidation |
title_short |
Characterization of coffee (Coffea arabica) husk lignin and degradation products obtained after oxygen and alkali addition |
title_full |
Characterization of coffee (Coffea arabica) husk lignin and degradation products obtained after oxygen and alkali addition |
title_fullStr |
Characterization of coffee (Coffea arabica) husk lignin and degradation products obtained after oxygen and alkali addition |
title_full_unstemmed |
Characterization of coffee (Coffea arabica) husk lignin and degradation products obtained after oxygen and alkali addition |
title_sort |
Characterization of coffee (Coffea arabica) husk lignin and degradation products obtained after oxygen and alkali addition |
author |
de Carvalho Oliveira, Fernanda |
author_facet |
de Carvalho Oliveira, Fernanda Srinivas, Keerthi Helms, Gregory L. Isern, Nancy G. Cort, John R. Gonçalves, Adilson Roberto [UNESP] Ahring, Birgitte Kiær |
author_role |
author |
author2 |
Srinivas, Keerthi Helms, Gregory L. Isern, Nancy G. Cort, John R. Gonçalves, Adilson Roberto [UNESP] Ahring, Birgitte Kiær |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) Washington State University Pacific Northwest National Laboratory Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
de Carvalho Oliveira, Fernanda Srinivas, Keerthi Helms, Gregory L. Isern, Nancy G. Cort, John R. Gonçalves, Adilson Roberto [UNESP] Ahring, Birgitte Kiær |
dc.subject.por.fl_str_mv |
Alkaline conditions Biorefinery Coffee husk Lignin Wet oxidation |
topic |
Alkaline conditions Biorefinery Coffee husk Lignin Wet oxidation |
description |
The full use of biomass in future biorefineries has stimulated studies on utilization of lignin from agricultural crops, such as coffee husk, a major residue from coffee processing. This study focuses on characterizing the lignin obtained from coffee husk and its further wet oxidation products as a function of alkali loading, temperature and residence time. The lignin fraction after diluted acid and alkali pretreatments is composed primarily of p-hydroxylphenyl units (≥49%), with fewer guaiacyl and syringyl units. Linkages appear to be mainly β-O-4 ether linkages. Thermal degradation of pretreated lignin during wet oxidation occurred in two stages. Carboxylic acids were the main degradation product. Due to the condensed structure of this lignin, relatively low yields of aromatic aldehydes were achieved, except with temperatures over 210 °C, 5 min residence time and 11.7 wt% NaOH. Optimization of the pretreatment and oxidation parameters are important to maximizing yield of high-value bioproducts from lignin. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-11T16:52:10Z 2018-12-11T16:52:10Z 2018-06-01 |
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.2018.01.041 Bioresource Technology, v. 257, p. 172-180. 1873-2976 0960-8524 http://hdl.handle.net/11449/170725 10.1016/j.biortech.2018.01.041 2-s2.0-85042695031 2504445010542631 0000-0001-8462-4619 |
url |
http://dx.doi.org/10.1016/j.biortech.2018.01.041 http://hdl.handle.net/11449/170725 |
identifier_str_mv |
Bioresource Technology, v. 257, p. 172-180. 1873-2976 0960-8524 10.1016/j.biortech.2018.01.041 2-s2.0-85042695031 2504445010542631 0000-0001-8462-4619 |
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 |
172-180 |
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 |
|
_version_ |
1808128765973233664 |