Measurements of activity coefficients at infinite dilution in vegetableoils and capric acid using the dilutor technique

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dc.contributor.authorChiavone Filho, Osvaldo
dc.contributor.authorBeltinga, Patrícia Castro
dc.contributor.authorRarey, Jürgen
dc.contributor.authorGmehling, Jürgen
dc.contributor.authorCeriani, Roberta
dc.contributor.authorMeirelles, Antonio José de Almeida
dc.date.accessioned2021-11-24T19:08:49Z
dc.date.available2021-11-24T19:08:49Z
dc.date.issued2014-01-15
dc.description.resumoThis paper reports experimental activity coefficients at infinite dilution, , for methanol, ethanol and n-hexane in three refined vegetable oils (soybean, sunflower, and rapeseed oils) measured using the dilutor technique (inert gas stripping method). The measurements were carried out in the temperature range between 313.15 and 353.15 K. Furthermore, activity coefficients at infinite dilution for various solutes (acetone, methanol, ethanol, n-hexane, cyclohexane and toluene) were measured in capric (decanoic) acid using the same technique in the temperature range from 313.13 to 353.30 K. The new data obtained for capric acid and soybean oil were compared with already published experimental data. Additionally, densities of the investigated vegetable oils were measured in the temperature range from 293.15 to 353.15 K. Using the experimental values obtained over the temperature range, the partial molar excess Gibbs energy , enthalpy and entropy at infinite dilution were determined. The relative error for the measurements carried out using the dilutor technique is approximately ±2.5%. The measured data in the investigated refined vegetable oils were also compared with the results of the group contribution methods original UNIFAC and modified UNIFAC (Dortmund) and an extension of the latter method to triacylglycerols was proposedpt_BR
dc.identifier.citationBELTING, Patrícia C.; RAREY, Jürgen; GMEHLING, Jürgen; CERIANI, Roberta; CHIAVONE-FILHO, Osvaldo; MEIRELLES, Antonio J.A.. Measurements of activity coefficients at infinite dilution in vegetable oils and capric acid using the dilutor technique. Fluid Phase Equilibria, [S.L.], v. 361, p. 215-222, jan. 2014. Disponível em: https://www.sciencedirect.com/science/article/pii/S0378381213006195?via%3Dihub Acesso em: 02 jul. 2021. https://doi.org/10.1016/j.fluid.2013.10.035pt_BR
dc.identifier.doi10.1016/j.fluid.2013.10.035
dc.identifier.issn0378-3812
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/45012
dc.languageenpt_BR
dc.publisherElsevierpt_BR
dc.subjectLimiting activity coefficientpt_BR
dc.subjectInert gas stripping methodpt_BR
dc.subjectOriginal UNIFAC modelpt_BR
dc.subjectModified UNIFAC (Dortmund) modelpt_BR
dc.subjectFatty compoundspt_BR
dc.titleMeasurements of activity coefficients at infinite dilution in vegetableoils and capric acid using the dilutor techniquept_BR
dc.typearticlept_BR

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