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Viscosity and density of two 1-alkyl-3-methyl-imidazolium triflate ionic liquids at high pressures: experimental measurements and the effect of alkyl chain length

2021-03Journal article Restricted access
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datacite.subject.sdg09:Indústria, Inovação e Infraestruturaspt_PT
dc.contributor.authorSequeira, Maria Carolina
dc.contributor.authorAvelino, Helena Maria da Nóbrega Teixeira
dc.contributor.authorCaetano, Fernando J. P.
dc.contributor.authorFareleira, João M. N. A.
dc.date.accessioned2022-01-17T10:18:56Z
dc.date.available2022-01-17T10:18:56Z
dc.date.issued2021-03
dc.description.abstractNew measurements of the viscosity of 1-butyl-3-methyl-imidazolium triflate ([BMIM][OTf]) and 1-hexyl-3-methyl-imidazolium triflate ([HMIM][OTf]) have been carried out at high pressures, using a vibrating-wire technique operated in the forced mode of oscillation. The measurements for [BMIM][OTf] have been performed along six isotherms from 298 to 358 K at pressures up to 50 MPa. The viscosity measurements for [HMIM][OTf] have been carried out along five isotherms from 303 to 358 K at pressures up to 50 MPa. The estimated uncertainty of the measurements is less than U(η) = 0.02·η for viscosities up to 68 mPa·s and less than U(η) = 0.026·η for higher viscosities, with a confidence level of 0.95 (k = 2). For both ionic liquids, complementary density measurements have been performed using an Anton Paar HP densimeter in the same temperature and pressure ranges as those used for the viscosity measurements. The density results have an uncertainty smaller than U(ρ) = 0.002·ρ with a confidence level of 0.95 (k = 2). The viscosity results were correlated with the density data using a previously described hard-sphere-based technique. The individual correlations are able to describe the viscosity results for each liquid with an uncertainty smaller than the estimated uncertainty of the experimental data. The effect of alkyl substituents on the viscosity and the density of these ionic liquids has been analyzed. For this purpose, previously published results for the viscosity and density of 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ([EMIM][OTf]) have been considered in addition to the data obtained in the present work for [BMIM][OTf] and [HMIM][OTf].pt_PT
dc.description.sponsorshipProject UID/QUI/00100/ 2013 (Fundação para a Ciência e a Tecnologia (FCT)); Project UID/QUI/00100/2019 (Fundação para a Ciência e a Tecnologia (FCT)).pt_PT
dc.description.sponsorshipUID/QUI/00100/2013
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1021/acs.jced.0c01057pt_PT
dc.identifier.issn1763−1772
dc.identifier.urihttp://hdl.handle.net/10400.2/11642
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherJournal of Chemical & Engineering Datapt_PT
dc.relationCentro de Química Estrutural
dc.subjectSaltspt_PT
dc.subjectViscositypt_PT
dc.subjectLiquidspt_PT
dc.subjectIsothermspt_PT
dc.subjectSolventspt_PT
dc.titleViscosity and density of two 1-alkyl-3-methyl-imidazolium triflate ionic liquids at high pressures: experimental measurements and the effect of alkyl chain lengthpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentro de Química Estrutural
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FQUI%2F00100%2F2019/PT
oaire.citation.endPage1772pt_PT
oaire.citation.issue4pt_PT
oaire.citation.startPage1763pt_PT
oaire.citation.titleJournal of Chemical & Engineering Datapt_PT
oaire.citation.volume66pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameSequeira
person.familyNameAvelino
person.familyNameCaetano
person.familyNameFareleira
person.givenNameMaria Carolina
person.givenNameHelena Maria da Nóbrega Teixeira
person.givenNameFernando J. P.
person.givenNameJoão
person.identifier.ciencia-idFF16-CEAC-461C
person.identifier.ciencia-id9615-6337-5695
person.identifier.ciencia-idDE17-708E-317F
person.identifier.ciencia-id8E1B-F54C-8ABD
person.identifier.orcid0000-0002-9746-2281
person.identifier.orcid0000-0001-6516-2164
person.identifier.orcid0000-0002-6821-1694
person.identifier.orcid0000-0002-8442-9386
person.identifier.ridH-8325-2012
person.identifier.scopus-author-id57209026585
person.identifier.scopus-author-id14919229800
person.identifier.scopus-author-id7004474824
person.identifier.scopus-author-id6603840268
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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