Kinetic modeling of hemicellulose-derived biomass hydrolysis under high pressure CO2–H2O mixture technology
Autor(a) principal: | |
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Data de Publicação: | 2015 |
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/10400.9/2878 |
Resumo: | This work is focused on the development of kinetic models of hydrolysis of hemicellulose-derived wheat straw under high-pressure CO2.H2O technology. The experiments were performed at fixed temperature (180.C), varying pressure from 0 (water-only reaction), 20, 35 to 50 bar of initial CO2 pressure and reaction times varied from 0 to 45 min. The three accurate kinetic models allowed to describe the effect of reaction conditions mainly hitherto not studied CO2 pressure and reaction time on the concentration of intermediate compounds such as xylose and arabinose in both oligomer and monomer form as well as final compounds e.g. acetic acid, furfural and other degradation products. Modeling demonstrated that addition of CO2 plays an important role in kinetics study of hemicellulose fraction hydrolysis being the fastest step the polysaccharides f hydrolysis into sugars in oligomer form. Even negligible amount of CO2 (20 bar of initial pressure) improves the initial kinetic constant of aforementioned reaction by almost 40% in comparison to water-only process. Depletion of oligosaccharides ' concentration and counterbalanced production of monomer sugars were found for longer reaction times, achieving maximum faster for CO2 assisted than CO2 free processes. Moreover, the increase of initial CO2 pressure demonstrated to be highly efficient in enhancement of the kinetic constants of all reactions occurring in the liquors. The developed models demonstrated a good fitting to the experimental data albeit the complex composition of raw material as well as the multistep analytical process. |
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Kinetic modeling of hemicellulose-derived biomass hydrolysis under high pressure CO2–H2O mixture technologyHydrolysisLignocellulosic biomassXylanHemicelluloseKineticsOligosaccharidesCarbon dioxideThis work is focused on the development of kinetic models of hydrolysis of hemicellulose-derived wheat straw under high-pressure CO2.H2O technology. The experiments were performed at fixed temperature (180.C), varying pressure from 0 (water-only reaction), 20, 35 to 50 bar of initial CO2 pressure and reaction times varied from 0 to 45 min. The three accurate kinetic models allowed to describe the effect of reaction conditions mainly hitherto not studied CO2 pressure and reaction time on the concentration of intermediate compounds such as xylose and arabinose in both oligomer and monomer form as well as final compounds e.g. acetic acid, furfural and other degradation products. Modeling demonstrated that addition of CO2 plays an important role in kinetics study of hemicellulose fraction hydrolysis being the fastest step the polysaccharides f hydrolysis into sugars in oligomer form. Even negligible amount of CO2 (20 bar of initial pressure) improves the initial kinetic constant of aforementioned reaction by almost 40% in comparison to water-only process. Depletion of oligosaccharides ' concentration and counterbalanced production of monomer sugars were found for longer reaction times, achieving maximum faster for CO2 assisted than CO2 free processes. Moreover, the increase of initial CO2 pressure demonstrated to be highly efficient in enhancement of the kinetic constants of all reactions occurring in the liquors. The developed models demonstrated a good fitting to the experimental data albeit the complex composition of raw material as well as the multistep analytical process.ElsevierRepositório do LNEGRelvas, F.Morais, Ana Rita C.Lukasik, Rafal M.2016-03-11T17:15:38Z2015-01-01T00:00:00Z2015-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.9/2878engRelvas, F.; Morais, A.R.; Bogel-Lukasik, R. - Kinetic modeling of hemicellulose-derived biomass hydrolysis under high pressure CO2–H2O mixture technology. In: Journal of Supercritical Fluids, 2015, Vol. 99, p. 95-1020896-844610.1016/j.supflu.2015.01.022info: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:RCAAP2022-09-06T12:28:07Zoai:repositorio.lneg.pt:10400.9/2878Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:35:55.231967Repositório 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 |
Kinetic modeling of hemicellulose-derived biomass hydrolysis under high pressure CO2–H2O mixture technology |
title |
Kinetic modeling of hemicellulose-derived biomass hydrolysis under high pressure CO2–H2O mixture technology |
spellingShingle |
Kinetic modeling of hemicellulose-derived biomass hydrolysis under high pressure CO2–H2O mixture technology Relvas, F. Hydrolysis Lignocellulosic biomass Xylan Hemicellulose Kinetics Oligosaccharides Carbon dioxide |
title_short |
Kinetic modeling of hemicellulose-derived biomass hydrolysis under high pressure CO2–H2O mixture technology |
title_full |
Kinetic modeling of hemicellulose-derived biomass hydrolysis under high pressure CO2–H2O mixture technology |
title_fullStr |
Kinetic modeling of hemicellulose-derived biomass hydrolysis under high pressure CO2–H2O mixture technology |
title_full_unstemmed |
Kinetic modeling of hemicellulose-derived biomass hydrolysis under high pressure CO2–H2O mixture technology |
title_sort |
Kinetic modeling of hemicellulose-derived biomass hydrolysis under high pressure CO2–H2O mixture technology |
author |
Relvas, F. |
author_facet |
Relvas, F. Morais, Ana Rita C. Lukasik, Rafal M. |
author_role |
author |
author2 |
Morais, Ana Rita C. Lukasik, Rafal M. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Repositório do LNEG |
dc.contributor.author.fl_str_mv |
Relvas, F. Morais, Ana Rita C. Lukasik, Rafal M. |
dc.subject.por.fl_str_mv |
Hydrolysis Lignocellulosic biomass Xylan Hemicellulose Kinetics Oligosaccharides Carbon dioxide |
topic |
Hydrolysis Lignocellulosic biomass Xylan Hemicellulose Kinetics Oligosaccharides Carbon dioxide |
description |
This work is focused on the development of kinetic models of hydrolysis of hemicellulose-derived wheat straw under high-pressure CO2.H2O technology. The experiments were performed at fixed temperature (180.C), varying pressure from 0 (water-only reaction), 20, 35 to 50 bar of initial CO2 pressure and reaction times varied from 0 to 45 min. The three accurate kinetic models allowed to describe the effect of reaction conditions mainly hitherto not studied CO2 pressure and reaction time on the concentration of intermediate compounds such as xylose and arabinose in both oligomer and monomer form as well as final compounds e.g. acetic acid, furfural and other degradation products. Modeling demonstrated that addition of CO2 plays an important role in kinetics study of hemicellulose fraction hydrolysis being the fastest step the polysaccharides f hydrolysis into sugars in oligomer form. Even negligible amount of CO2 (20 bar of initial pressure) improves the initial kinetic constant of aforementioned reaction by almost 40% in comparison to water-only process. Depletion of oligosaccharides ' concentration and counterbalanced production of monomer sugars were found for longer reaction times, achieving maximum faster for CO2 assisted than CO2 free processes. Moreover, the increase of initial CO2 pressure demonstrated to be highly efficient in enhancement of the kinetic constants of all reactions occurring in the liquors. The developed models demonstrated a good fitting to the experimental data albeit the complex composition of raw material as well as the multistep analytical process. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-01-01T00:00:00Z 2015-01-01T00:00:00Z 2016-03-11T17:15:38Z |
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/10400.9/2878 |
url |
http://hdl.handle.net/10400.9/2878 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Relvas, F.; Morais, A.R.; Bogel-Lukasik, R. - Kinetic modeling of hemicellulose-derived biomass hydrolysis under high pressure CO2–H2O mixture technology. In: Journal of Supercritical Fluids, 2015, Vol. 99, p. 95-102 0896-8446 10.1016/j.supflu.2015.01.022 |
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 |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
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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