Hydrolysis of sucrose using sulfonated poly(vinyl alcohol) as catalyst
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/6115 https://doi.org/10.1016/j.biortech.2009.04.060 |
Resumo: | The hydrolysis of sucrose was carried out over poly(vinyl alcohol) (PVA) with sulfonic acid groups, at 80 º C. The products of sucrose hydrolysis were glucose and fructose. A series of PVA with different crosslinking degree were prepared. It was observed that the catalytic activity of PVA matrix increases with the crosslinking degree, due to the increases of the amount of sulfonic acid groups on PVA. Further, the influence of various reaction parameters, such as, catalyst loading, initial concentration of sucrose and temperature, on the hydrolysis of sucrose over PVA_40 was studied. It was found that at 80 C, with 0.511 g of catalyst loading and with an initial concentration of sucrose of 0.6 M, a sucrose conversion of about 90%, after 3 h, could be obtained. The PVA_40 catalyst was recycled and reused with negligible loss in the activity. A simple kinetic model was developed assuming that the sucrose hydrolysis is an irreversible reaction and the first order with respect to the sucrose concentration. Since the concentration profiles of the reactant and the products do not exhibit any pronounced initial inductive period, the external and internal diffusion of the reactant and products on the catalyst were not considered. It was observed that the kinetic model fits experimental concentration data quite well. |
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Hydrolysis of sucrose using sulfonated poly(vinyl alcohol) as catalystSucroseHydrolysisSulfonic acid groupsPVAThe hydrolysis of sucrose was carried out over poly(vinyl alcohol) (PVA) with sulfonic acid groups, at 80 º C. The products of sucrose hydrolysis were glucose and fructose. A series of PVA with different crosslinking degree were prepared. It was observed that the catalytic activity of PVA matrix increases with the crosslinking degree, due to the increases of the amount of sulfonic acid groups on PVA. Further, the influence of various reaction parameters, such as, catalyst loading, initial concentration of sucrose and temperature, on the hydrolysis of sucrose over PVA_40 was studied. It was found that at 80 C, with 0.511 g of catalyst loading and with an initial concentration of sucrose of 0.6 M, a sucrose conversion of about 90%, after 3 h, could be obtained. The PVA_40 catalyst was recycled and reused with negligible loss in the activity. A simple kinetic model was developed assuming that the sucrose hydrolysis is an irreversible reaction and the first order with respect to the sucrose concentration. Since the concentration profiles of the reactant and the products do not exhibit any pronounced initial inductive period, the external and internal diffusion of the reactant and products on the catalyst were not considered. It was observed that the kinetic model fits experimental concentration data quite well.Elsevier2012-11-29T15:47:00Z2012-11-292009-10-20T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/6115http://hdl.handle.net/10174/6115https://doi.org/10.1016/j.biortech.2009.04.060porBioresource Technology 100 (2009) 4546–4550Departamento de Químicandndndndjefc@uevora.pt433Pito, DFonseca, IRamos, AVital, JCastanheiro, Jinfo: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:RCAAP2024-01-03T18:45:33Zoai:dspace.uevora.pt:10174/6115Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:01:03.340009Repositório 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 |
Hydrolysis of sucrose using sulfonated poly(vinyl alcohol) as catalyst |
title |
Hydrolysis of sucrose using sulfonated poly(vinyl alcohol) as catalyst |
spellingShingle |
Hydrolysis of sucrose using sulfonated poly(vinyl alcohol) as catalyst Pito, D Sucrose Hydrolysis Sulfonic acid groups PVA |
title_short |
Hydrolysis of sucrose using sulfonated poly(vinyl alcohol) as catalyst |
title_full |
Hydrolysis of sucrose using sulfonated poly(vinyl alcohol) as catalyst |
title_fullStr |
Hydrolysis of sucrose using sulfonated poly(vinyl alcohol) as catalyst |
title_full_unstemmed |
Hydrolysis of sucrose using sulfonated poly(vinyl alcohol) as catalyst |
title_sort |
Hydrolysis of sucrose using sulfonated poly(vinyl alcohol) as catalyst |
author |
Pito, D |
author_facet |
Pito, D Fonseca, I Ramos, A Vital, J Castanheiro, J |
author_role |
author |
author2 |
Fonseca, I Ramos, A Vital, J Castanheiro, J |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Pito, D Fonseca, I Ramos, A Vital, J Castanheiro, J |
dc.subject.por.fl_str_mv |
Sucrose Hydrolysis Sulfonic acid groups PVA |
topic |
Sucrose Hydrolysis Sulfonic acid groups PVA |
description |
The hydrolysis of sucrose was carried out over poly(vinyl alcohol) (PVA) with sulfonic acid groups, at 80 º C. The products of sucrose hydrolysis were glucose and fructose. A series of PVA with different crosslinking degree were prepared. It was observed that the catalytic activity of PVA matrix increases with the crosslinking degree, due to the increases of the amount of sulfonic acid groups on PVA. Further, the influence of various reaction parameters, such as, catalyst loading, initial concentration of sucrose and temperature, on the hydrolysis of sucrose over PVA_40 was studied. It was found that at 80 C, with 0.511 g of catalyst loading and with an initial concentration of sucrose of 0.6 M, a sucrose conversion of about 90%, after 3 h, could be obtained. The PVA_40 catalyst was recycled and reused with negligible loss in the activity. A simple kinetic model was developed assuming that the sucrose hydrolysis is an irreversible reaction and the first order with respect to the sucrose concentration. Since the concentration profiles of the reactant and the products do not exhibit any pronounced initial inductive period, the external and internal diffusion of the reactant and products on the catalyst were not considered. It was observed that the kinetic model fits experimental concentration data quite well. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-10-20T00:00:00Z 2012-11-29T15:47:00Z 2012-11-29 |
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/10174/6115 http://hdl.handle.net/10174/6115 https://doi.org/10.1016/j.biortech.2009.04.060 |
url |
http://hdl.handle.net/10174/6115 https://doi.org/10.1016/j.biortech.2009.04.060 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Bioresource Technology 100 (2009) 4546–4550 Departamento de Química nd nd nd nd jefc@uevora.pt 433 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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 |
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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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1799136494054539264 |