The effect of the chemical character of ionic liquids on biomass pre-treatment and posterior enzymatic hydrolysis
Autor(a) principal: | |
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Data de Publicação: | 2019 |
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/10400.9/3217 |
Resumo: | ABSTRACT: Ionic liquids have been recognised as interesting solvents applicable in efficient lignocellulosic biomass valorisation, especially in biomass fractionation into individual polymeric components or direct hydrolysis of some biomass fractions. Considering the chemical character of ionic liquids, two different approaches paved the way for the fractionation of biomass. The first strategy integrated a pre-treatment, hydrolysis and conversion of biomass through the employment of hydrogen-bond acidic 1-ethyl-3-methyimidazolim hydrogen sulphate ionic liquid. The second strategy relied on the use of a three-step fractionation process with hydrogen-bond basic 1-ethyl-3-methylimidazolium acetate to produce high purity cellulose, hemicellulose and lignin fractions. The proposed approaches were scrutinised for wheat straw and eucalyptus residues. These different biomasses enabled an understanding that enzymatic hydrolysis yields are dependent on the crystallinity of the pre-treated biomass. The use of acetate based ionic liquid allowed crystalline cellulose I to change to cellulose II and consequently enhanced the glucan to glucose yield to 93.1 +/- 4.1 mol% and 82.9 +/- 1.2 mol% for wheat straw and eucalyptus, respectively. However, for hydrogen sulphate ionic liquid, the same enzymatic hydrolysis yields were 61.6 +/- 0.2 mol% for wheat straw and only 7.9 +/- 0.3 mol% for eucalyptus residues. These results demonstrate the importance of both ionic liquid character and biomass type for efficient biomass processing. |
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The effect of the chemical character of ionic liquids on biomass pre-treatment and posterior enzymatic hydrolysisBiomassValorisationIonic liquidsEnzymatic hydrolysisPretreatmentsABSTRACT: Ionic liquids have been recognised as interesting solvents applicable in efficient lignocellulosic biomass valorisation, especially in biomass fractionation into individual polymeric components or direct hydrolysis of some biomass fractions. Considering the chemical character of ionic liquids, two different approaches paved the way for the fractionation of biomass. The first strategy integrated a pre-treatment, hydrolysis and conversion of biomass through the employment of hydrogen-bond acidic 1-ethyl-3-methyimidazolim hydrogen sulphate ionic liquid. The second strategy relied on the use of a three-step fractionation process with hydrogen-bond basic 1-ethyl-3-methylimidazolium acetate to produce high purity cellulose, hemicellulose and lignin fractions. The proposed approaches were scrutinised for wheat straw and eucalyptus residues. These different biomasses enabled an understanding that enzymatic hydrolysis yields are dependent on the crystallinity of the pre-treated biomass. The use of acetate based ionic liquid allowed crystalline cellulose I to change to cellulose II and consequently enhanced the glucan to glucose yield to 93.1 +/- 4.1 mol% and 82.9 +/- 1.2 mol% for wheat straw and eucalyptus, respectively. However, for hydrogen sulphate ionic liquid, the same enzymatic hydrolysis yields were 61.6 +/- 0.2 mol% for wheat straw and only 7.9 +/- 0.3 mol% for eucalyptus residues. These results demonstrate the importance of both ionic liquid character and biomass type for efficient biomass processing.MDPIRepositório do LNEGBernardo, JoanaGírio, FranciscoLukasik, Rafal M.2020-03-30T16:28:11Z2019-01-01T00:00:00Z2019-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.9/3217engBernardo, Joana R... [et.al.] - The effect of the chemical character of ionic liquids on biomass pre-treatment and posterior enzymatic hydrolysis. In: Molecules, 2019, Vol. 24(4), article nº 8081420-304910.3390/molecules24040808info: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:RCAAP2022-09-06T12:28:40Zoai:repositorio.lneg.pt:10400.9/3217Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:36:27.161614Repositório 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 |
The effect of the chemical character of ionic liquids on biomass pre-treatment and posterior enzymatic hydrolysis |
title |
The effect of the chemical character of ionic liquids on biomass pre-treatment and posterior enzymatic hydrolysis |
spellingShingle |
The effect of the chemical character of ionic liquids on biomass pre-treatment and posterior enzymatic hydrolysis Bernardo, Joana Biomass Valorisation Ionic liquids Enzymatic hydrolysis Pretreatments |
title_short |
The effect of the chemical character of ionic liquids on biomass pre-treatment and posterior enzymatic hydrolysis |
title_full |
The effect of the chemical character of ionic liquids on biomass pre-treatment and posterior enzymatic hydrolysis |
title_fullStr |
The effect of the chemical character of ionic liquids on biomass pre-treatment and posterior enzymatic hydrolysis |
title_full_unstemmed |
The effect of the chemical character of ionic liquids on biomass pre-treatment and posterior enzymatic hydrolysis |
title_sort |
The effect of the chemical character of ionic liquids on biomass pre-treatment and posterior enzymatic hydrolysis |
author |
Bernardo, Joana |
author_facet |
Bernardo, Joana Gírio, Francisco Lukasik, Rafal M. |
author_role |
author |
author2 |
Gírio, Francisco Lukasik, Rafal M. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Repositório do LNEG |
dc.contributor.author.fl_str_mv |
Bernardo, Joana Gírio, Francisco Lukasik, Rafal M. |
dc.subject.por.fl_str_mv |
Biomass Valorisation Ionic liquids Enzymatic hydrolysis Pretreatments |
topic |
Biomass Valorisation Ionic liquids Enzymatic hydrolysis Pretreatments |
description |
ABSTRACT: Ionic liquids have been recognised as interesting solvents applicable in efficient lignocellulosic biomass valorisation, especially in biomass fractionation into individual polymeric components or direct hydrolysis of some biomass fractions. Considering the chemical character of ionic liquids, two different approaches paved the way for the fractionation of biomass. The first strategy integrated a pre-treatment, hydrolysis and conversion of biomass through the employment of hydrogen-bond acidic 1-ethyl-3-methyimidazolim hydrogen sulphate ionic liquid. The second strategy relied on the use of a three-step fractionation process with hydrogen-bond basic 1-ethyl-3-methylimidazolium acetate to produce high purity cellulose, hemicellulose and lignin fractions. The proposed approaches were scrutinised for wheat straw and eucalyptus residues. These different biomasses enabled an understanding that enzymatic hydrolysis yields are dependent on the crystallinity of the pre-treated biomass. The use of acetate based ionic liquid allowed crystalline cellulose I to change to cellulose II and consequently enhanced the glucan to glucose yield to 93.1 +/- 4.1 mol% and 82.9 +/- 1.2 mol% for wheat straw and eucalyptus, respectively. However, for hydrogen sulphate ionic liquid, the same enzymatic hydrolysis yields were 61.6 +/- 0.2 mol% for wheat straw and only 7.9 +/- 0.3 mol% for eucalyptus residues. These results demonstrate the importance of both ionic liquid character and biomass type for efficient biomass processing. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-01-01T00:00:00Z 2019-01-01T00:00:00Z 2020-03-30T16:28:11Z |
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/10400.9/3217 |
url |
http://hdl.handle.net/10400.9/3217 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Bernardo, Joana R... [et.al.] - The effect of the chemical character of ionic liquids on biomass pre-treatment and posterior enzymatic hydrolysis. In: Molecules, 2019, Vol. 24(4), article nº 808 1420-3049 10.3390/molecules24040808 |
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 |
MDPI |
publisher.none.fl_str_mv |
MDPI |
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 |
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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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1799130230209642496 |