Oxygen mass transfer in a high solids loading three-phase internal-loop airlift reactor

Detalhes bibliográficos
Autor(a) principal: Freitas, Carla Maria Duarte de
Data de Publicação: 2001
Outros Autores: Teixeira, J. 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/1822/1700
Resumo: Determinations of volumetric mass transfer coefficient were conducted in a three-phase internal-loop airlift reactor with an enlarged degassing zone. The effect of parameters such as the airflow rate (riser superficial gas velocities between 0.01 and 0.5 m/s), solids loading (up to 30%, v/v), solids density (1023 and 1048 kg/m3) and the liquid-phase properties on kLa was studied. It was observed that the increase of the airflow rate and the introduction of ethanol enhanced the volumetric mass transfer coefficient in the system. On the contrary, the progressive introduction of solids and a small increase on solids density were responsible for the diminishing of the mass transfer rate. Correlations for the volumetric mass transfer coefficient with the riser superficial gas velocity and solids loading were determined for the two solids density and the two liquid-phases. A good agreement between experimental data and the calculated values was obtained.
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spelling Oxygen mass transfer in a high solids loading three-phase internal-loop airlift reactorAirlift reactorMass transferSolids densitySolids loadingLiquid-phase propertiesairlift reactorsScience & TechnologyDeterminations of volumetric mass transfer coefficient were conducted in a three-phase internal-loop airlift reactor with an enlarged degassing zone. The effect of parameters such as the airflow rate (riser superficial gas velocities between 0.01 and 0.5 m/s), solids loading (up to 30%, v/v), solids density (1023 and 1048 kg/m3) and the liquid-phase properties on kLa was studied. It was observed that the increase of the airflow rate and the introduction of ethanol enhanced the volumetric mass transfer coefficient in the system. On the contrary, the progressive introduction of solids and a small increase on solids density were responsible for the diminishing of the mass transfer rate. Correlations for the volumetric mass transfer coefficient with the riser superficial gas velocity and solids loading were determined for the two solids density and the two liquid-phases. A good agreement between experimental data and the calculated values was obtained.Instituto de Biotecnologia e Química Fina. Fundação para a Ciência e a Tecnologia -PRAXIS/2/2.1/BIO/1061/95, GGPXXI/BD/2937/96. EC - INCO-COPERNICUS - no. ERB IC15-CT98-0904.Elsevier ScienceUniversidade do MinhoFreitas, Carla Maria Duarte deTeixeira, J. A.20012001-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/1700eng“Chemical engineering journal”. 84:1 (2001) 57-61.1385-894710.1016/S1385-8947(00)00274-6info: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:RCAAP2023-07-21T12:52:08Zoai:repositorium.sdum.uminho.pt:1822/1700Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:51:11.846627Repositório 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 Oxygen mass transfer in a high solids loading three-phase internal-loop airlift reactor
title Oxygen mass transfer in a high solids loading three-phase internal-loop airlift reactor
spellingShingle Oxygen mass transfer in a high solids loading three-phase internal-loop airlift reactor
Freitas, Carla Maria Duarte de
Airlift reactor
Mass transfer
Solids density
Solids loading
Liquid-phase properties
airlift reactors
Science & Technology
title_short Oxygen mass transfer in a high solids loading three-phase internal-loop airlift reactor
title_full Oxygen mass transfer in a high solids loading three-phase internal-loop airlift reactor
title_fullStr Oxygen mass transfer in a high solids loading three-phase internal-loop airlift reactor
title_full_unstemmed Oxygen mass transfer in a high solids loading three-phase internal-loop airlift reactor
title_sort Oxygen mass transfer in a high solids loading three-phase internal-loop airlift reactor
author Freitas, Carla Maria Duarte de
author_facet Freitas, Carla Maria Duarte de
Teixeira, J. A.
author_role author
author2 Teixeira, J. A.
author2_role author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Freitas, Carla Maria Duarte de
Teixeira, J. A.
dc.subject.por.fl_str_mv Airlift reactor
Mass transfer
Solids density
Solids loading
Liquid-phase properties
airlift reactors
Science & Technology
topic Airlift reactor
Mass transfer
Solids density
Solids loading
Liquid-phase properties
airlift reactors
Science & Technology
description Determinations of volumetric mass transfer coefficient were conducted in a three-phase internal-loop airlift reactor with an enlarged degassing zone. The effect of parameters such as the airflow rate (riser superficial gas velocities between 0.01 and 0.5 m/s), solids loading (up to 30%, v/v), solids density (1023 and 1048 kg/m3) and the liquid-phase properties on kLa was studied. It was observed that the increase of the airflow rate and the introduction of ethanol enhanced the volumetric mass transfer coefficient in the system. On the contrary, the progressive introduction of solids and a small increase on solids density were responsible for the diminishing of the mass transfer rate. Correlations for the volumetric mass transfer coefficient with the riser superficial gas velocity and solids loading were determined for the two solids density and the two liquid-phases. A good agreement between experimental data and the calculated values was obtained.
publishDate 2001
dc.date.none.fl_str_mv 2001
2001-01-01T00:00:00Z
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/1822/1700
url http://hdl.handle.net/1822/1700
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv “Chemical engineering journal”. 84:1 (2001) 57-61.
1385-8947
10.1016/S1385-8947(00)00274-6
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 Science
publisher.none.fl_str_mv Elsevier Science
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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