Using image analysis in the study of multiphase gas absorption

Detalhes bibliográficos
Autor(a) principal: Mena, P. C.
Data de Publicação: 2005
Outros Autores: Pons, M. N., Teixeira, J. A., Rocha, F. A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/3367
Resumo: For the air–water–calcium alginate beads system, the effect of the presence of solids on the mass transfer characteristics in a bubble column was experimentally studied. Volumetric liquid side mass transfer coefficient, kLa, specific interfacial area, a, and hence liquid side mass transfer coefficient, kL, were determined under different solid concentrations (0, 5, and 10 vol%), superficial gas velocities (up to 0.27 cm/s) and solid sizes (1.2 and 2.1mm diameter). The bubble characteristics, namely the interfacial area, were obtained using an image analysis technique. This technique proved to be a suitable and practical method to characterize mass transfer phenomena in bubble columns for the range of operating conditions used. The solids affect negatively kLa, decreasing both a and kL, the effect being more pronounced for the smaller particles. For these particles the variation of kLa is due to the variation of its two components, while for larger particles kLa variation is due, essentially, to changes in kL as no significant differences in a were observed.
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spelling Using image analysis in the study of multiphase gas absorptionAbsorptionBubble columnMass transferMultiphase reactorsImage analysisParticlesScience & TechnologyFor the air–water–calcium alginate beads system, the effect of the presence of solids on the mass transfer characteristics in a bubble column was experimentally studied. Volumetric liquid side mass transfer coefficient, kLa, specific interfacial area, a, and hence liquid side mass transfer coefficient, kL, were determined under different solid concentrations (0, 5, and 10 vol%), superficial gas velocities (up to 0.27 cm/s) and solid sizes (1.2 and 2.1mm diameter). The bubble characteristics, namely the interfacial area, were obtained using an image analysis technique. This technique proved to be a suitable and practical method to characterize mass transfer phenomena in bubble columns for the range of operating conditions used. The solids affect negatively kLa, decreasing both a and kL, the effect being more pronounced for the smaller particles. For these particles the variation of kLa is due to the variation of its two components, while for larger particles kLa variation is due, essentially, to changes in kL as no significant differences in a were observed.Fundação para a Ciência e Tecnologia (FCT)ElsevierUniversidade do MinhoMena, P. C.Pons, M. N.Teixeira, J. A.Rocha, F. A.2005-092005-09-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/3367eng"Chemical Engineering Science". ISSN 0009-2509. 60:18(Sept. 2005) 5144-5150.0009-250910.1016/j.ces.2005.04.049http://www.sciencedirect.com/science/journal/00092509info: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:RCAAP2023-07-21T12:39:08Zoai:repositorium.sdum.uminho.pt:1822/3367Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:35:41.693101Repositório 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 Using image analysis in the study of multiphase gas absorption
title Using image analysis in the study of multiphase gas absorption
spellingShingle Using image analysis in the study of multiphase gas absorption
Mena, P. C.
Absorption
Bubble column
Mass transfer
Multiphase reactors
Image analysis
Particles
Science & Technology
title_short Using image analysis in the study of multiphase gas absorption
title_full Using image analysis in the study of multiphase gas absorption
title_fullStr Using image analysis in the study of multiphase gas absorption
title_full_unstemmed Using image analysis in the study of multiphase gas absorption
title_sort Using image analysis in the study of multiphase gas absorption
author Mena, P. C.
author_facet Mena, P. C.
Pons, M. N.
Teixeira, J. A.
Rocha, F. A.
author_role author
author2 Pons, M. N.
Teixeira, J. A.
Rocha, F. A.
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Mena, P. C.
Pons, M. N.
Teixeira, J. A.
Rocha, F. A.
dc.subject.por.fl_str_mv Absorption
Bubble column
Mass transfer
Multiphase reactors
Image analysis
Particles
Science & Technology
topic Absorption
Bubble column
Mass transfer
Multiphase reactors
Image analysis
Particles
Science & Technology
description For the air–water–calcium alginate beads system, the effect of the presence of solids on the mass transfer characteristics in a bubble column was experimentally studied. Volumetric liquid side mass transfer coefficient, kLa, specific interfacial area, a, and hence liquid side mass transfer coefficient, kL, were determined under different solid concentrations (0, 5, and 10 vol%), superficial gas velocities (up to 0.27 cm/s) and solid sizes (1.2 and 2.1mm diameter). The bubble characteristics, namely the interfacial area, were obtained using an image analysis technique. This technique proved to be a suitable and practical method to characterize mass transfer phenomena in bubble columns for the range of operating conditions used. The solids affect negatively kLa, decreasing both a and kL, the effect being more pronounced for the smaller particles. For these particles the variation of kLa is due to the variation of its two components, while for larger particles kLa variation is due, essentially, to changes in kL as no significant differences in a were observed.
publishDate 2005
dc.date.none.fl_str_mv 2005-09
2005-09-01T00:00:00Z
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/1822/3367
url http://hdl.handle.net/1822/3367
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv "Chemical Engineering Science". ISSN 0009-2509. 60:18(Sept. 2005) 5144-5150.
0009-2509
10.1016/j.ces.2005.04.049
http://www.sciencedirect.com/science/journal/00092509
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
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