Gas–liquid mass transfer in an airlift reactor — analytical solution and experimental confirmation
Identifieur interne : 000738 ( Istex/Corpus ); précédent : 000737; suivant : 000739Gas–liquid mass transfer in an airlift reactor — analytical solution and experimental confirmation
Auteurs : Hatem Dhaouadi ; Souhila Poncin ; Noël Midoux ; Gabriel WildSource :
- Chemical Engineering & Processing: Process Intensification [ 0255-2701 ] ; 2001.
English descriptors
- KwdEn :
- Airlift, Airlift reactor, Airlift reactors, Analytical solution, Axial dispersion, Basic equations, Chemical engineering, Complete model, Dhaouadi, Dimensionless, Downcomer, Dynamic method, Elsevier science, External loop airlift reactor, Laplace, Liquid circulation, Liquid mass transfer, Mass transfer, Oxygen concentration, Oxygen probe, Riser, Same reactor, Sophisticated model, Static pressure, Volumetric mass transfer.
- Teeft :
- Airlift, Airlift reactor, Airlift reactors, Analytical solution, Axial dispersion, Basic equations, Chemical engineering, Complete model, Dhaouadi, Dimensionless, Downcomer, Dynamic method, Elsevier science, External loop airlift reactor, Laplace, Liquid circulation, Liquid mass transfer, Mass transfer, Oxygen concentration, Oxygen probe, Riser, Same reactor, Sophisticated model, Static pressure, Volumetric mass transfer.
Abstract
Abstract: Gas–liquid mass transfer behavior in an external loop airlift reactor is investigated. The riser and the downcomer of 6 m height have a diameter of 0.15 and 0.08 m, respectively. The classical ‘gassing out’ dynamic method is used to obtain the evolution with time of dissolved oxygen concentration profiles. An analytical description of the concentration profiles with time following the switch in the inlet gas concentration is presented and allows the evaluation of the gas–liquid mass transfer coefficient for the different gas velocities used. The comparison between the values of kLa determined from this simplified model and those obtained in the same reactor from a more complete and sophisticated model shows a good agreement.
Url:
DOI: 10.1016/S0255-2701(00)00132-X
Links to Exploration step
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<front><div type="abstract" xml:lang="en">Abstract: Gas–liquid mass transfer behavior in an external loop airlift reactor is investigated. The riser and the downcomer of 6 m height have a diameter of 0.15 and 0.08 m, respectively. The classical ‘gassing out’ dynamic method is used to obtain the evolution with time of dissolved oxygen concentration profiles. An analytical description of the concentration profiles with time following the switch in the inlet gas concentration is presented and allows the evaluation of the gas–liquid mass transfer coefficient for the different gas velocities used. The comparison between the values of kLa determined from this simplified model and those obtained in the same reactor from a more complete and sophisticated model shows a good agreement.</div>
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<notesStmt><note type="content">Fig. 1: Elementary models used for mass transfer description in the external loop airlift reactor, (a) complete model [3]; (b) simplified model used here.</note>
<note type="content">Fig. 2: Experimental to analytical solution adjustment for a given axial position in the riser (uG=0.057 m s−1).</note>
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<abstract xml:lang="en"><p>Gas–liquid mass transfer behavior in an external loop airlift reactor is investigated. The riser and the downcomer of 6 m height have a diameter of 0.15 and 0.08 m, respectively. The classical ‘gassing out’ dynamic method is used to obtain the evolution with time of dissolved oxygen concentration profiles. An analytical description of the concentration profiles with time following the switch in the inlet gas concentration is presented and allows the evaluation of the gas–liquid mass transfer coefficient for the different gas velocities used. The comparison between the values of kLa determined from this simplified model and those obtained in the same reactor from a more complete and sophisticated model shows a good agreement.</p>
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<ce:author-group><ce:author><ce:given-name>Hatem</ce:given-name>
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<ce:text>Corresponding author. Tel.: +33-83-175223; fax: +33-83-322975</ce:text>
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<ce:abstract><ce:section-title>Abstract</ce:section-title>
<ce:abstract-sec><ce:simple-para>Gas–liquid mass transfer behavior in an external loop airlift reactor is investigated. The riser and the downcomer of 6 m height have a diameter of 0.15 and 0.08 m, respectively. The classical ‘gassing out’ dynamic method is used to obtain the evolution with time of dissolved oxygen concentration profiles. An analytical description of the concentration profiles with time following the switch in the inlet gas concentration is presented and allows the evaluation of the gas–liquid mass transfer coefficient for the different gas velocities used. The comparison between the values of <ce:italic>k</ce:italic>
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<ce:keywords class="keyword"><ce:section-title>Keywords</ce:section-title>
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<ce:keyword><ce:text>Mass transfer</ce:text>
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<ce:keyword><ce:text>Analytical solution</ce:text>
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<mods version="3.6"><titleInfo lang="en"><title>Gas–liquid mass transfer in an airlift reactor — analytical solution and experimental confirmation</title>
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<name type="personal"><namePart type="given">Hatem</namePart>
<namePart type="family">Dhaouadi</namePart>
<affiliation>Laboratoire des Sciences du Génie Chimique, Ctr Nat de la Recherche Scientifique (CNRS)-ENSIC, BP 451-1 rue Grandville, 54001 Nancy, Cedex, France</affiliation>
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<name type="personal"><namePart type="given">Souhila</namePart>
<namePart type="family">Poncin</namePart>
<affiliation>E-mail: Souhila.Poncin@ensic.inpl-nancy.fr</affiliation>
<affiliation>Laboratoire des Sciences du Génie Chimique, Ctr Nat de la Recherche Scientifique (CNRS)-ENSIC, BP 451-1 rue Grandville, 54001 Nancy, Cedex, France</affiliation>
<description>Corresponding author. Tel.: +33-83-175223; fax: +33-83-322975</description>
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<name type="personal"><namePart type="given">Noël</namePart>
<namePart type="family">Midoux</namePart>
<affiliation>Laboratoire des Sciences du Génie Chimique, Ctr Nat de la Recherche Scientifique (CNRS)-ENSIC, BP 451-1 rue Grandville, 54001 Nancy, Cedex, France</affiliation>
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<name type="personal"><namePart type="given">Gabriel</namePart>
<namePart type="family">Wild</namePart>
<affiliation>Laboratoire des Sciences du Génie Chimique, Ctr Nat de la Recherche Scientifique (CNRS)-ENSIC, BP 451-1 rue Grandville, 54001 Nancy, Cedex, France</affiliation>
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<dateIssued encoding="w3cdtf">2001</dateIssued>
<dateModified encoding="w3cdtf">2000-01-15</dateModified>
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<abstract lang="en">Abstract: Gas–liquid mass transfer behavior in an external loop airlift reactor is investigated. The riser and the downcomer of 6 m height have a diameter of 0.15 and 0.08 m, respectively. The classical ‘gassing out’ dynamic method is used to obtain the evolution with time of dissolved oxygen concentration profiles. An analytical description of the concentration profiles with time following the switch in the inlet gas concentration is presented and allows the evaluation of the gas–liquid mass transfer coefficient for the different gas velocities used. The comparison between the values of kLa determined from this simplified model and those obtained in the same reactor from a more complete and sophisticated model shows a good agreement.</abstract>
<note type="content">Fig. 1: Elementary models used for mass transfer description in the external loop airlift reactor, (a) complete model [3]; (b) simplified model used here.</note>
<note type="content">Fig. 2: Experimental to analytical solution adjustment for a given axial position in the riser (uG=0.057 m s−1).</note>
<note type="content">Fig. 3: Comparison between values of kLa obtained by the analytic solution and the numerical solution (complete model, see [3]).</note>
<subject lang="en"><genre>Keywords</genre>
<topic>Airlift</topic>
<topic>Mass transfer</topic>
<topic>Analytical solution</topic>
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<dateIssued encoding="w3cdtf">200102</dateIssued>
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<identifier type="ISSN">0255-2701</identifier>
<identifier type="PII">S0255-2701(00)X0022-0</identifier>
<part><date>200102</date>
<detail type="volume"><number>40</number>
<caption>vol.</caption>
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<detail type="issue"><number>2</number>
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<extent unit="issue-pages"><start>85</start>
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<identifier type="DOI">10.1016/S0255-2701(00)00132-X</identifier>
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<accessCondition type="use and reproduction" contentType="copyright">©2001 Elsevier Science B.V.</accessCondition>
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