Using image analysis in the study of multiphase gas absorption
Autor(a) principal: | |
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Data de Publicação: | 2005 |
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/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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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 |
repository.mail.fl_str_mv |
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1799132883872382976 |