Simulation of membrane separations using a modified Maxwell-Stefan model

Detalhes bibliográficos
Autor(a) principal: Brito, Paulo
Data de Publicação: 2009
Outros Autores: Gando-Ferreira, Licínio M., Portugal, António
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10198/1265
Resumo: In this work, a modified Maxwell-Stefan model, which considers both the concentration polarization and the transport through the membrane, is tested for the simulation of Dextran T70 aqueous solutions filtration. Numerical simulations by solving the model equations with an adaptive resolution algorithm, based on the Adaptive Method of Lines, determined the concentration profiles in the polarization layer and inside the membrane pore. It is shown that the formation of significant solute accumulation at the membrane/polarization interface leads to high levels of apparent rejection. A tubular cross-flow ultrafiltration module, containing a tubular polysulfone membrane with a molecular weight cut-off of 50 kDa, was used to perform the experiments. The model is able to successfully simulate data in the high rejection/low flux region using an equilibrium constant Keq of 0.25, but does not reproduce the observed rejection drop/pressure build-up which occurs for increased fluxes, which may be due to limitations of the model itself.
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spelling Simulation of membrane separations using a modified Maxwell-Stefan modelModelingUltrafiltrationMaxwell Stefan equationApparent rejectionAdaptive methodsIn this work, a modified Maxwell-Stefan model, which considers both the concentration polarization and the transport through the membrane, is tested for the simulation of Dextran T70 aqueous solutions filtration. Numerical simulations by solving the model equations with an adaptive resolution algorithm, based on the Adaptive Method of Lines, determined the concentration profiles in the polarization layer and inside the membrane pore. It is shown that the formation of significant solute accumulation at the membrane/polarization interface leads to high levels of apparent rejection. A tubular cross-flow ultrafiltration module, containing a tubular polysulfone membrane with a molecular weight cut-off of 50 kDa, was used to perform the experiments. The model is able to successfully simulate data in the high rejection/low flux region using an equilibrium constant Keq of 0.25, but does not reproduce the observed rejection drop/pressure build-up which occurs for increased fluxes, which may be due to limitations of the model itself.The Berkeley Electronic PressBiblioteca Digital do IPBBrito, PauloGando-Ferreira, Licínio M.Portugal, António2010-01-12T12:02:13Z20092009-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/1265engBrito, Paulo; Gando-Ferreira, Licínio M.; Portugal, António (2009). Simulation of membrane separations using a modified Maxwell-Stefan model. Chemical Product and Process Modeling. ISSN 1538-0645. 4:4, p.1-121934-2659info: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:RCAAP2023-11-21T10:04:44Zoai:bibliotecadigital.ipb.pt:10198/1265Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T22:54:47.794108Repositório 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 Simulation of membrane separations using a modified Maxwell-Stefan model
title Simulation of membrane separations using a modified Maxwell-Stefan model
spellingShingle Simulation of membrane separations using a modified Maxwell-Stefan model
Brito, Paulo
Modeling
Ultrafiltration
Maxwell Stefan equation
Apparent rejection
Adaptive methods
title_short Simulation of membrane separations using a modified Maxwell-Stefan model
title_full Simulation of membrane separations using a modified Maxwell-Stefan model
title_fullStr Simulation of membrane separations using a modified Maxwell-Stefan model
title_full_unstemmed Simulation of membrane separations using a modified Maxwell-Stefan model
title_sort Simulation of membrane separations using a modified Maxwell-Stefan model
author Brito, Paulo
author_facet Brito, Paulo
Gando-Ferreira, Licínio M.
Portugal, António
author_role author
author2 Gando-Ferreira, Licínio M.
Portugal, António
author2_role author
author
dc.contributor.none.fl_str_mv Biblioteca Digital do IPB
dc.contributor.author.fl_str_mv Brito, Paulo
Gando-Ferreira, Licínio M.
Portugal, António
dc.subject.por.fl_str_mv Modeling
Ultrafiltration
Maxwell Stefan equation
Apparent rejection
Adaptive methods
topic Modeling
Ultrafiltration
Maxwell Stefan equation
Apparent rejection
Adaptive methods
description In this work, a modified Maxwell-Stefan model, which considers both the concentration polarization and the transport through the membrane, is tested for the simulation of Dextran T70 aqueous solutions filtration. Numerical simulations by solving the model equations with an adaptive resolution algorithm, based on the Adaptive Method of Lines, determined the concentration profiles in the polarization layer and inside the membrane pore. It is shown that the formation of significant solute accumulation at the membrane/polarization interface leads to high levels of apparent rejection. A tubular cross-flow ultrafiltration module, containing a tubular polysulfone membrane with a molecular weight cut-off of 50 kDa, was used to perform the experiments. The model is able to successfully simulate data in the high rejection/low flux region using an equilibrium constant Keq of 0.25, but does not reproduce the observed rejection drop/pressure build-up which occurs for increased fluxes, which may be due to limitations of the model itself.
publishDate 2009
dc.date.none.fl_str_mv 2009
2009-01-01T00:00:00Z
2010-01-12T12:02:13Z
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/10198/1265
url http://hdl.handle.net/10198/1265
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Brito, Paulo; Gando-Ferreira, Licínio M.; Portugal, António (2009). Simulation of membrane separations using a modified Maxwell-Stefan model. Chemical Product and Process Modeling. ISSN 1538-0645. 4:4, p.1-12
1934-2659
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 The Berkeley Electronic Press
publisher.none.fl_str_mv The Berkeley Electronic Press
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
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