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Assessing the activity coefficients of water in cholinium-based ionic liquids: experimental measurements and COSMO-RS modeling

dc.contributor.authorKhan, Imran
dc.contributor.authorKurnia, Kiki A.
dc.contributor.authorSintra, Tânia E.
dc.contributor.authorSaraiva, Jorge A.
dc.contributor.authorPinho, Simão
dc.contributor.authorCoutinho, João A.P.
dc.date.accessioned2016-10-10T13:17:39Z
dc.date.available2016-10-10T13:17:39Z
dc.date.issued2014
dc.description.abstractThe vapor liquid-equilibrium of water + ionic liquids is relevant for a wide range of applications of these compounds. It is usually measured by ebulliometric techniques, but these are time consuming and expensive. In this work it is shown that the activity coefficients of water in a series of cholinium-based ionic liquids can be reliably and quickly estimated at 298.15K using a humidity meter instrument. The cholinium based ionic liquids were chosen to test this experimental methodology since data for water activities of quaternary ammonium salts are available in the literature allowing the validation of the proposed technique. The COSMO-RS method provides a reliable description of the data and was also used to understand the molecular interactions occurring on these binary systems. The estimated excess enthalpies indicate that hydrogen bonding between water and ionic liquid anion is the dominant interaction that governs the behavior of water and cholinium-based ionic liquids systems, while the electrostatic-misfit and van der Walls forces have a minor contribution to the total excess enthalpies.pt_PT
dc.identifier.citationKhan, Imran; Kurnia, Kiki A.; Sintra, Tânia E.; Saraiva, Jorge A.; Pinho, Simão; Coutinho, João A.P. (2014). Assessing the activity coefficients of water in cholinium-based ionic liquids: experimental measurements and COSMO-RS modeling. Fluid Phase Equilibria. ISSN 0378-3812. 361, p. 16-22pt_PT
dc.identifier.doi10.1016/j.fluid.2013.10.032pt_PT
dc.identifier.issn0378-3812
dc.identifier.urihttp://hdl.handle.net/10198/13371
dc.language.isoengpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectWater activitypt_PT
dc.subjectCholinept_PT
dc.subjectCOSMO-RSpt_PT
dc.subjectAb initiopt_PT
dc.titleAssessing the activity coefficients of water in cholinium-based ionic liquids: experimental measurements and COSMO-RS modelingpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage22pt_PT
oaire.citation.startPage16pt_PT
oaire.citation.titleFluid Phase Equilibriapt_PT
oaire.citation.volume361pt_PT
person.familyNamePinho
person.givenNameSimão
person.identifier810882
person.identifier.ciencia-id481D-73AD-8D0F
person.identifier.orcid0000-0002-9211-857X
person.identifier.ridD-4148-2013
person.identifier.scopus-author-id7003570175
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication8ef7789a-34f3-4915-a666-4efe26272a30
relation.isAuthorOfPublication.latestForDiscovery8ef7789a-34f3-4915-a666-4efe26272a30

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