Statistical tool combined with image analysis to characterize hydrodynamics and mass transfer in a bubble column
Autor(a) principal: | |
---|---|
Data de Publicação: | 2012 |
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/1822/16699 |
Resumo: | Image analysis technique has been proved to be very effective in the quantification of particles size and morphology distributions in different work areas. In the present work this technique was combined with the discriminant factorial analysis (DFA) in order to allow the automatic identification of single bubbles (isolated bubbles without influence of surrounded bubbles) in multiphase systems. With the previous methodology it has been possible to distinguish online and automatically among three different classes of bubbles (single bubbles and medium complexity and large complexity bubbles groups), allowing for the first time the computation of the local bubble population complexity in the system. The automatic and correct characterization of the single bubbles allowed the correct determination of bubble size and, consequently, the specific interfacial area a at different experimental conditions. Agreement between automated and manual classification, measured in terms of a performance index, is 98% for single bubbles identification. Further, the present work describes the application of such methodology to the study of temperature, type of gas sparger, and liquid phase properties (viscosity and surface tension) influence on the individual components of volumetric liquid side mass transfer coefficient, kLa. The results show that the different experimental parameters and liquid properties act by a particular way on kL and a. |
id |
RCAP_dc516f90d366d17d0cb7e600ec8afa8b |
---|---|
oai_identifier_str |
oai:repositorium.sdum.uminho.pt:1822/16699 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Statistical tool combined with image analysis to characterize hydrodynamics and mass transfer in a bubble columnBubble columnMass transferMultiphase reactorsHydrodynamicsImage analysisScience & TechnologyImage analysis technique has been proved to be very effective in the quantification of particles size and morphology distributions in different work areas. In the present work this technique was combined with the discriminant factorial analysis (DFA) in order to allow the automatic identification of single bubbles (isolated bubbles without influence of surrounded bubbles) in multiphase systems. With the previous methodology it has been possible to distinguish online and automatically among three different classes of bubbles (single bubbles and medium complexity and large complexity bubbles groups), allowing for the first time the computation of the local bubble population complexity in the system. The automatic and correct characterization of the single bubbles allowed the correct determination of bubble size and, consequently, the specific interfacial area a at different experimental conditions. Agreement between automated and manual classification, measured in terms of a performance index, is 98% for single bubbles identification. Further, the present work describes the application of such methodology to the study of temperature, type of gas sparger, and liquid phase properties (viscosity and surface tension) influence on the individual components of volumetric liquid side mass transfer coefficient, kLa. The results show that the different experimental parameters and liquid properties act by a particular way on kL and a.This work was supported by Fundacao para a Ciencia e Tecnologia under program contract number SFRH/BPD/45637/2008.ElsevierUniversidade do MinhoFerreira, A. M. A.Pereira, G.Teixeira, J. A.Rocha, F. A.20122012-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/16699eng1385-894710.1016/j.cej.2011.09.117info: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:RCAAP2023-07-21T12:30:54Zoai:repositorium.sdum.uminho.pt:1822/16699Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:26:09.261631Repositório 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 |
Statistical tool combined with image analysis to characterize hydrodynamics and mass transfer in a bubble column |
title |
Statistical tool combined with image analysis to characterize hydrodynamics and mass transfer in a bubble column |
spellingShingle |
Statistical tool combined with image analysis to characterize hydrodynamics and mass transfer in a bubble column Ferreira, A. M. A. Bubble column Mass transfer Multiphase reactors Hydrodynamics Image analysis Science & Technology |
title_short |
Statistical tool combined with image analysis to characterize hydrodynamics and mass transfer in a bubble column |
title_full |
Statistical tool combined with image analysis to characterize hydrodynamics and mass transfer in a bubble column |
title_fullStr |
Statistical tool combined with image analysis to characterize hydrodynamics and mass transfer in a bubble column |
title_full_unstemmed |
Statistical tool combined with image analysis to characterize hydrodynamics and mass transfer in a bubble column |
title_sort |
Statistical tool combined with image analysis to characterize hydrodynamics and mass transfer in a bubble column |
author |
Ferreira, A. M. A. |
author_facet |
Ferreira, A. M. A. Pereira, G. Teixeira, J. A. Rocha, F. A. |
author_role |
author |
author2 |
Pereira, G. 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 |
Ferreira, A. M. A. Pereira, G. Teixeira, J. A. Rocha, F. A. |
dc.subject.por.fl_str_mv |
Bubble column Mass transfer Multiphase reactors Hydrodynamics Image analysis Science & Technology |
topic |
Bubble column Mass transfer Multiphase reactors Hydrodynamics Image analysis Science & Technology |
description |
Image analysis technique has been proved to be very effective in the quantification of particles size and morphology distributions in different work areas. In the present work this technique was combined with the discriminant factorial analysis (DFA) in order to allow the automatic identification of single bubbles (isolated bubbles without influence of surrounded bubbles) in multiphase systems. With the previous methodology it has been possible to distinguish online and automatically among three different classes of bubbles (single bubbles and medium complexity and large complexity bubbles groups), allowing for the first time the computation of the local bubble population complexity in the system. The automatic and correct characterization of the single bubbles allowed the correct determination of bubble size and, consequently, the specific interfacial area a at different experimental conditions. Agreement between automated and manual classification, measured in terms of a performance index, is 98% for single bubbles identification. Further, the present work describes the application of such methodology to the study of temperature, type of gas sparger, and liquid phase properties (viscosity and surface tension) influence on the individual components of volumetric liquid side mass transfer coefficient, kLa. The results show that the different experimental parameters and liquid properties act by a particular way on kL and a. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012 2012-01-01T00:00:00Z |
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/1822/16699 |
url |
http://hdl.handle.net/1822/16699 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
1385-8947 10.1016/j.cej.2011.09.117 |
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 |
|
_version_ |
1799132747738906624 |