Effect of surfactants on liquid-side mass transfer coefficients
Identifieur interne : 001515 ( Main/Exploration ); précédent : 001514; suivant : 001516Effect of surfactants on liquid-side mass transfer coefficients
Auteurs : Pisut Painmanakul [France] ; Karine Loubiere [France] ; Gilles Hebrard [France] ; Martine Mietton-Peuchot [France] ; Michel Roustan [France]Source :
- Chemical engineering science [ 0009-2509 ] ; 2005.
Descripteurs français
- Pascal (Inist)
- Agent surface, Coefficient transfert masse, Transfert masse, Bulle, Aire interfaciale, Tension superficielle, Méthode dynamique, Concentration critique micellaire, Adsorption, Eau distribution, Solution aqueuse, Agent surface cationique, Phase liquide, Colonne bulle, Coefficient transfert matière volumétrique, Vitesse ascension, Hydrodynamique, Condition opératoire, Méthode mesure, Prédiction.
English descriptors
- KwdEn :
- Adsorption, Aqueous solution, Bubble, Bubble column, Cationic surfactant, Dynamic method, Hydrodynamics, Interfacial area, Liquid phase, Mass transfer, Mass transfer coefficient, Measurement method, Micellar critical concentration, Operating conditions, Prediction, Rising velocity, Surface tension, Surfactant, Tap water, Volumetric mass transfer coefficient.
Abstract
In the present paper, the effect of liquid properties (surfactants) on bubble generation phenomenon, interfacial area and liquid-side mass transfer coefficient was investigated. The measurements of surface tension (static and dynamic methods), of critical micelle concentration (CMC) and of characteristic adsorption parameters such as the surface coverage ratio at equilibrium (se) were performed to understand the effects of surfactants on the mass transfer efficiency. Tap water and aqueous solutions with surfactants (cationic and anionic) were used as liquid phases and an elastic membrane with a single orifice as gas sparger. The bubbles were generated into a small-scale bubble column. The local liquid-side mass transfer coefficient (kL) was obtained from the volumetric mass transfer coefficient (kLa) and the interfacial area (a) was deduced from the bubble diameter (DB), the bubble frequency (fB) and the terminal bubble rising velocity (UB). Only the dynamic bubble regime was considered in this work (ReOR = 150-1000 and We = 0.002-4). This study has clearly shown that the presence of surfactants affects the bubble generation phenomenon and thus the interfacial area (a) and the different mass transfer parameters, such as the volumetric mass transfer coefficient (kLa) and the liquid-side mass transfer coefficient (kL). Whatever the operating conditions, the new kLa determination method has provided good accuracy without assuming that the liquid phase is perfectly mixed as in the classical method. The surface coverage ratio (se) proves to be crucial for predicting the changes of kL in aqueous solutions with surfactants.
Affiliations:
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i1="01"><s1>Laboratoire d'Ingénierie des Procédés de l'Environnement, Dpt G.P.I., Institut National des Sciences Appliquées, 135 avenue de Rangueil</s1><s2>31077 Toulouse</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Occitanie (région administrative)</region><region type="old region" nuts="2">Midi-Pyrénées</region><settlement type="city">Toulouse</settlement></placeName></affiliation></author><author><name sortKey="Mietton Peuchot, Martine" sort="Mietton Peuchot, Martine" uniqKey="Mietton Peuchot M" first="Martine" last="Mietton-Peuchot">Martine Mietton-Peuchot</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Laboratoire de Génie des Procédés JE2241 Faculté dœnologie Victor Ségalen</s1><s2>Bordeaux 33405</s2><s3>FRA</s3><sZ>4 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Nouvelle-Aquitaine</region><region type="old region" nuts="2">Aquitaine</region></placeName></affiliation></author><author><name sortKey="Roustan, Michel" sort="Roustan, Michel" uniqKey="Roustan M" first="Michel" last="Roustan">Michel Roustan</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Laboratoire d'Ingénierie des Procédés de l'Environnement, Dpt G.P.I., Institut National des Sciences Appliquées, 135 avenue de Rangueil</s1><s2>31077 Toulouse</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Occitanie (région administrative)</region><region type="old region" nuts="2">Midi-Pyrénées</region><settlement type="city">Toulouse</settlement></placeName></affiliation></author></analytic><series><title level="j" type="main">Chemical engineering science</title><title level="j" type="abbreviated">Chem. eng. sci.</title><idno type="ISSN">0009-2509</idno><imprint><date when="2005">2005</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Chemical engineering science</title><title level="j" type="abbreviated">Chem. eng. sci.</title><idno type="ISSN">0009-2509</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adsorption</term><term>Aqueous solution</term><term>Bubble</term><term>Bubble column</term><term>Cationic surfactant</term><term>Dynamic method</term><term>Hydrodynamics</term><term>Interfacial area</term><term>Liquid phase</term><term>Mass transfer</term><term>Mass transfer coefficient</term><term>Measurement method</term><term>Micellar critical concentration</term><term>Operating conditions</term><term>Prediction</term><term>Rising velocity</term><term>Surface tension</term><term>Surfactant</term><term>Tap water</term><term>Volumetric mass transfer coefficient</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Agent surface</term><term>Coefficient transfert masse</term><term>Transfert masse</term><term>Bulle</term><term>Aire interfaciale</term><term>Tension superficielle</term><term>Méthode dynamique</term><term>Concentration critique micellaire</term><term>Adsorption</term><term>Eau distribution</term><term>Solution aqueuse</term><term>Agent surface cationique</term><term>Phase liquide</term><term>Colonne bulle</term><term>Coefficient transfert matière volumétrique</term><term>Vitesse ascension</term><term>Hydrodynamique</term><term>Condition opératoire</term><term>Méthode mesure</term><term>Prédiction</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In the present paper, the effect of liquid properties (surfactants) on bubble generation phenomenon, interfacial area and liquid-side mass transfer coefficient was investigated. The measurements of surface tension (static and dynamic methods), of critical micelle concentration (CMC) and of characteristic adsorption parameters such as the surface coverage ratio at equilibrium (s<sub>e</sub>) were performed to understand the effects of surfactants on the mass transfer efficiency. Tap water and aqueous solutions with surfactants (cationic and anionic) were used as liquid phases and an elastic membrane with a single orifice as gas sparger. The bubbles were generated into a small-scale bubble column. The local liquid-side mass transfer coefficient (k<sub>L</sub>) was obtained from the volumetric mass transfer coefficient (k<sub>L</sub>a) and the interfacial area (a) was deduced from the bubble diameter (D<sub>B</sub>), the bubble frequency (f<sub>B</sub>) and the terminal bubble rising velocity (U<sub>B</sub>). Only the dynamic bubble regime was considered in this work (Re<sub>OR</sub> = 150-1000 and We = 0.002-4). This study has clearly shown that the presence of surfactants affects the bubble generation phenomenon and thus the interfacial area (a) and the different mass transfer parameters, such as the volumetric mass transfer coefficient (k<sub>L</sub>a) and the liquid-side mass transfer coefficient (k<sub>L</sub>). Whatever the operating conditions, the new k<sub>L</sub>a determination method has provided good accuracy without assuming that the liquid phase is perfectly mixed as in the classical method. The surface coverage ratio (s<sub>e</sub>) proves to be crucial for predicting the changes of k<sub>L</sub> in aqueous solutions with surfactants.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Aquitaine</li><li>Midi-Pyrénées</li><li>Nouvelle-Aquitaine</li><li>Occitanie (région administrative)</li></region><settlement><li>Toulouse</li></settlement></list><tree><country name="France"><region name="Occitanie (région administrative)"><name sortKey="Painmanakul, Pisut" sort="Painmanakul, Pisut" uniqKey="Painmanakul P" first="Pisut" last="Painmanakul">Pisut Painmanakul</name></region><name sortKey="Hebrard, Gilles" sort="Hebrard, Gilles" uniqKey="Hebrard G" first="Gilles" last="Hebrard">Gilles Hebrard</name><name sortKey="Loubiere, Karine" sort="Loubiere, Karine" uniqKey="Loubiere K" first="Karine" last="Loubiere">Karine Loubiere</name><name sortKey="Mietton Peuchot, Martine" sort="Mietton Peuchot, Martine" uniqKey="Mietton Peuchot M" first="Martine" last="Mietton-Peuchot">Martine Mietton-Peuchot</name><name sortKey="Roustan, Michel" sort="Roustan, Michel" uniqKey="Roustan M" first="Michel" last="Roustan">Michel Roustan</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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