Calculation of liquid-liquid equilibrium of aqueous two-phase systems using a chemical-theory-based excess Gibbs energy model

dc.creatorPessôa Filho, P. A.
dc.creatorMohamed, R. S.
dc.date2004-09-01
dc.date2014-07-17T17:37:50Z
dc.date2015-11-26T11:45:54Z
dc.date2014-07-17T17:37:50Z
dc.date2015-11-26T11:45:54Z
dc.date.accessioned2018-03-28T20:49:38Z
dc.date.available2018-03-28T20:49:38Z
dc.identifierBrazilian Journal of Chemical Engineering. Brazilian Society of Chemical Engineering, v. 21, n. 3, p. 471-478, 2004.
dc.identifier0104-6632
dc.identifierS0104-66322004000300011
dc.identifier10.1590/S0104-66322004000300011
dc.identifierhttp://dx.doi.org/10.1590/S0104-66322004000300011
dc.identifierhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322004000300011
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/26118
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/26118
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1235976
dc.descriptionMixtures containing compounds that undergo hydrogen bonding show large deviations from ideal behavior. These deviations can be accounted for through chemical theory, according to which the formation of a hydrogen bond can be treated as a chemical reaction. This chemical equilibrium needs to be taken into account when applying stability criteria and carrying out phase equilibrium calculations. In this work, we illustrate the application of the stability criteria to establish the conditions under which a liquid-phase split may occur and the subsequent calculation of liquid-liquid equilibrium using a chemical-theory-modified Flory-Huggins equation to describe the non ideality of aqueous two-phase systems composed of poly(ethylene glycol) and dextran. The model was found to be able to correlate ternary liquid-liquid diagrams reasonably well by simple adjustment of the polymer-polymer binary interaction parameter.
dc.description471
dc.description478
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageen
dc.publisherBrazilian Society of Chemical Engineering
dc.relationBrazilian Journal of Chemical Engineering
dc.rightsaberto
dc.sourceSciELO
dc.subjectAqueous two-phase systems
dc.subjectthermodynamic modeling
dc.subjectGibbs energy
dc.subjectliquid-liquid equilibrium
dc.titleCalculation of liquid-liquid equilibrium of aqueous two-phase systems using a chemical-theory-based excess Gibbs energy model
dc.typeArtículos de revistas


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