Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides
Autor(a) principal: | |
---|---|
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/10400.13/3221 |
Resumo: | The hydrolysis of hemicellulosic oligosaccharides (OS) was investigated using acid-activated clays (prepared from natural Porto Santo montmorillonite clay) as catalysts. Acid activation was performed in HCl solution or with aluminium exchange. The clay catalysts were characterized by XRD, N2 adsorption isotherms, CEC, FTIR, titration of acid sites in water and adsorption of sugars and disaccharides. They were tested for the hydrolysis of a model compound, maltose, and of OS-rich liquor from rice straw fractionation. The HCl-activated clays were the most efficient catalysts for maltose hydrolysis. It was demonstrated that the hydrolysis of OS into monomer sugars over a clay catalyst is technically feasible and that this reaction leads to the selective removal of glucose, arabinose and acetic acid side groups from the OS structure, thus yielding simpler xylo-oligosaccharide chains. Furthermore, no significant conversion of monomer sugars into furans was observed. |
id |
RCAP_799accded5fbf448bd31b030299c1f9e |
---|---|
oai_identifier_str |
oai:digituma.uma.pt:10400.13/3221 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharidesAcid-modified claysGreen catalystsHydrolysis of hemicellulosic oligosaccharides.Faculdade de Ciências Exatas e da EngenhariaThe hydrolysis of hemicellulosic oligosaccharides (OS) was investigated using acid-activated clays (prepared from natural Porto Santo montmorillonite clay) as catalysts. Acid activation was performed in HCl solution or with aluminium exchange. The clay catalysts were characterized by XRD, N2 adsorption isotherms, CEC, FTIR, titration of acid sites in water and adsorption of sugars and disaccharides. They were tested for the hydrolysis of a model compound, maltose, and of OS-rich liquor from rice straw fractionation. The HCl-activated clays were the most efficient catalysts for maltose hydrolysis. It was demonstrated that the hydrolysis of OS into monomer sugars over a clay catalyst is technically feasible and that this reaction leads to the selective removal of glucose, arabinose and acetic acid side groups from the OS structure, thus yielding simpler xylo-oligosaccharide chains. Furthermore, no significant conversion of monomer sugars into furans was observed.Royal Society of ChemistryDigitUMaVilcocq, LéaSpínola, VítorMoniz, PatríciaDuarte, Luís C.Carvalheiro, FlorbelaFernandes, CésarCastilho, Paula2021-03-30T10:47:18Z20152015-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.13/3221engVilcocq, L., Spinola, V., Moniz, P., Duarte, L. C., Carvalheiro, F., Fernandes, C., & Castilho, P. (2015). Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides. Catalysis Science & Technology, 5(8), 4072-4080.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:RCAAP2023-03-26T03:39:11Zoai:digituma.uma.pt:10400.13/3221Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:06:10.497607Repositório 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 |
Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides |
title |
Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides |
spellingShingle |
Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides Vilcocq, Léa Acid-modified clays Green catalysts Hydrolysis of hemicellulosic oligosaccharides . Faculdade de Ciências Exatas e da Engenharia |
title_short |
Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides |
title_full |
Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides |
title_fullStr |
Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides |
title_full_unstemmed |
Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides |
title_sort |
Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides |
author |
Vilcocq, Léa |
author_facet |
Vilcocq, Léa Spínola, Vítor Moniz, Patrícia Duarte, Luís C. Carvalheiro, Florbela Fernandes, César Castilho, Paula |
author_role |
author |
author2 |
Spínola, Vítor Moniz, Patrícia Duarte, Luís C. Carvalheiro, Florbela Fernandes, César Castilho, Paula |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
DigitUMa |
dc.contributor.author.fl_str_mv |
Vilcocq, Léa Spínola, Vítor Moniz, Patrícia Duarte, Luís C. Carvalheiro, Florbela Fernandes, César Castilho, Paula |
dc.subject.por.fl_str_mv |
Acid-modified clays Green catalysts Hydrolysis of hemicellulosic oligosaccharides . Faculdade de Ciências Exatas e da Engenharia |
topic |
Acid-modified clays Green catalysts Hydrolysis of hemicellulosic oligosaccharides . Faculdade de Ciências Exatas e da Engenharia |
description |
The hydrolysis of hemicellulosic oligosaccharides (OS) was investigated using acid-activated clays (prepared from natural Porto Santo montmorillonite clay) as catalysts. Acid activation was performed in HCl solution or with aluminium exchange. The clay catalysts were characterized by XRD, N2 adsorption isotherms, CEC, FTIR, titration of acid sites in water and adsorption of sugars and disaccharides. They were tested for the hydrolysis of a model compound, maltose, and of OS-rich liquor from rice straw fractionation. The HCl-activated clays were the most efficient catalysts for maltose hydrolysis. It was demonstrated that the hydrolysis of OS into monomer sugars over a clay catalyst is technically feasible and that this reaction leads to the selective removal of glucose, arabinose and acetic acid side groups from the OS structure, thus yielding simpler xylo-oligosaccharide chains. Furthermore, no significant conversion of monomer sugars into furans was observed. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015 2015-01-01T00:00:00Z 2021-03-30T10:47:18Z |
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/10400.13/3221 |
url |
http://hdl.handle.net/10400.13/3221 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Vilcocq, L., Spinola, V., Moniz, P., Duarte, L. C., Carvalheiro, F., Fernandes, C., & Castilho, P. (2015). Acid-modified clays as green catalysts for the hydrolysis of hemicellulosic oligosaccharides. Catalysis Science & Technology, 5(8), 4072-4080. |
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 |
Royal Society of Chemistry |
publisher.none.fl_str_mv |
Royal Society of Chemistry |
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 |
|
_version_ |
1799129932460195840 |