Do ternary liquid mixtures exhibit negative main Fick diffusion coefficients?

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dc.contributor.authorKozlova, S.
dc.contributor.authorMialdun, Aliaksandr
dc.contributor.authorRyzhkov, I.
dc.contributor.authorJanzen, Tatjana
dc.contributor.authorVrabec, Jadran
dc.contributor.authorShevtsova, Valentina
dc.date.accessioned2019-04-11T13:04:06Z
dc.date.available2019-04-11T13:04:06Z
dc.date.issued2019-01-07
dc.description.abstractExperimental data on Fick diffusion coefficients of ternary and higher mixtures depend on the reference frame; those which are in common use are associated with the average velocity either with respect to volume, mass or mole number. In this study, the dependence of diffusion coefficients on the reference frame is thoroughly analyzed for three ternary mixtures of different types. The first one, tetralin–isobutylbenzene–dodecane, can almost be considered as ideal, the second one, cyclohexane–toluene–methanol, exhibits liquid–liquid phase separation and the third one, water–ethanol–triethylene glycol, contains three associating species and is also strongly non-ideal. Experimental diffusion coefficient data sampled in the volume reference frame are transformed to the molar and mass reference frames. The required partial molar volumes are derived from present density measurements. Four additional mixtures are considered along a single or two composition paths. A highlight of this study is the existence of a strong similarity of the main diffusion coefficients in the volume and mass reference frames for all considered mixtures. When the excess volume is small, the coefficients in the molar reference frame are also similar. However, for the mixture with a large excess volume (containing water), the diffusion coefficients in the molar reference frame differ significantly, even indicating negative main diffusion coefficients. It is shown that negative main diffusion coefficients appear due to relatively large experimental uncertainties of cross diffusion coefficients, which are propagated and amplified by frame transformation.en
dc.identifier.eissn1463-9084
dc.identifier.issn1463-9076
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/9316
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-8389
dc.language.isoen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subject.ddc540 Chemie und zugeordnete Wissenschaftende
dc.subject.ddc530 Physikde
dc.subject.otherternary mixtureen
dc.subject.otherFick diffusion coefficientsen
dc.subject.othermolar volumesen
dc.subject.otherreference framesen
dc.subject.otherDCMIXen
dc.titleDo ternary liquid mixtures exhibit negative main Fick diffusion coefficients?en
dc.typeArticleen
dc.type.versionacceptedVersionen
dcterms.bibliographicCitation.doi10.1039/C8CP06795C
dcterms.bibliographicCitation.issue4
dcterms.bibliographicCitation.journaltitlePhysical Chemistry, Chemical Physicsen
dcterms.bibliographicCitation.originalpublishernameRoyal Society of Chemistryen
dcterms.bibliographicCitation.originalpublisherplaceCambridgeen
dcterms.bibliographicCitation.pageend2152
dcterms.bibliographicCitation.pagestart2140
dcterms.bibliographicCitation.volume21
tub.accessrights.dnbdomain*
tub.affiliationFak. 3 Prozesswissenschaften::Inst. Prozess- und Verfahrenstechnik::FG Thermodynamik und Thermische Verfahrenstechnikde
tub.affiliation.facultyFak. 3 Prozesswissenschaftende
tub.affiliation.groupFG Thermodynamik und Thermische Verfahrenstechnikde
tub.affiliation.instituteInst. Prozess- und Verfahrenstechnikde
tub.publisher.universityorinstitutionTechnische Universität Berlinde

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