Temperature polarization in pervaporation
Identifieur interne : 001681 ( Main/Exploration ); précédent : 001680; suivant : 001682Temperature polarization in pervaporation
Auteurs : Éric Favre (génie des procédés) [France]Source :
- Desalination : (Amsterdam) [ 0011-9164 ] ; 2003.
Descripteurs français
- Pascal (Inist)
- Séparation par membrane, Pervaporation, Membrane polymère, Cellulose acétate, Siloxane(diméthyl) polymère, Cellulose régénérée, Eau, Ethanol, Butanol, Pentanol, Propionique acide ester éthyle, Phénomène transport, Transfert masse, Transfert chaleur, Polarisation température, Etude théorique, Etude expérimentale.
- Wicri :
- topic : Eau.
English descriptors
- KwdEn :
Abstract
The incidence of temperature polarization has received considerable attention in membrane processes such as membrane distillation and thermoosmosis but has been much less investigated in pervaporation. Based on a theoretical computation on a case study (pervaporation of water through a dense cellulose acetate membrane), it has been confirmed that this phenomenon is likely to occur frequently, as soon as a thin and permeable membrane is used, with the temperature drop being located essentially in the liquid boundary layer. Experimental investigations on the importance of temperature polarization and its influence on pervaporation flux have been further performed with pure liquids (water and organic compounds) by changing the impeller agitation rate in a batch stirred cell. Different membrane materials (cellulose acetate, Cuprophan, PDMS, PEBA) and various liquids (water, ethanol, butanol, pentanol, ethyl propionate) were investigated in order to point out the influence of either liquid or membrane material physicochemical properties on the temperature polarization effect. A simplified data treatment of the observed results, derived from theoretical computations, is proposed and discussed.
Affiliations:
- France
- Grand Est, Lorraine (région)
- Nancy
- Centre national de la recherche scientifique, Laboratoire réactions et génie des procédés, Université de Lorraine
Links toward previous steps (curation, corpus...)
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- to stream PascalFrancis, to step Curation: 000294
- to stream PascalFrancis, to step Checkpoint: 000702
- to stream Main, to step Merge: 001935
- to stream Main, to step Curation: 001681
Le document en format XML
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Based on a theoretical computation on a case study (pervaporation of water through a dense cellulose acetate membrane), it has been confirmed that this phenomenon is likely to occur frequently, as soon as a thin and permeable membrane is used, with the temperature drop being located essentially in the liquid boundary layer. Experimental investigations on the importance of temperature polarization and its influence on pervaporation flux have been further performed with pure liquids (water and organic compounds) by changing the impeller agitation rate in a batch stirred cell. Different membrane materials (cellulose acetate, Cuprophan, PDMS, PEBA) and various liquids (water, ethanol, butanol, pentanol, ethyl propionate) were investigated in order to point out the influence of either liquid or membrane material physicochemical properties on the temperature polarization effect. A simplified data treatment of the observed results, derived from theoretical computations, is proposed and discussed.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Grand Est</li><li>Lorraine (région)</li></region><settlement><li>Nancy</li></settlement><orgName><li>Centre national de la recherche scientifique</li><li>Laboratoire réactions et génie des procédés</li><li>Université de Lorraine</li></orgName></list><tree><country name="France"><region name="Grand Est"><name sortKey="Favre, E" sort="Favre, E" uniqKey="Favre E" first="E." last="Favre">Éric Favre (génie des procédés)</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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