Repository logo
 
Publication

Viscosity measurements of 1-ethyl-3-methylimidazolium trifluoromethanesulfonate (EMIM OTf) at high pressures using the vibrating wire technique

2020-02Journal article Restricted access
Simple item page
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.accessioned2022-01-20T16:18:40Z
dc.date.available2022-01-20T16:18:40Z
dc.date.issued2020-02
dc.description.abstractThe goal of the present work is to contribute to the characterization of ionic liquids by measuring their viscosity at high pressures. As 1-ethyl-3-methylimidazolium trifluoromethanesulfonate (EMIM OTf) has been used as a solvent in CO2 capture processes, the temperature and pressure ranges of the measurements cover the intervals used in those processes. Measurements of the viscosity of EMIM OTf along five isotherms in the range (298–358) K and at pressures up to 50 MPa, have been performed using the vibrating wire technique in the forced mode of operation. As far as the authors are aware, these are the first measurements of this ionic liquid at pressures higher than 0.1 MPa, to be published. The viscosity results were correlated with the molar volume, using a modified hard-spheres model. The root mean square (σ) deviation of the data from the correlation is less than 0.5% The expanded uncertainty of the present viscosity data is estimated as ±2.0% at a 95% confidence level. As a complement, the pressure-viscosity coefficient has been calculated within the temperature range of the present results. Previous studies of the influence of the electric conductivity of ionic liquids, including EMIM OTf, in the vibrating wire method, have been taken into account for the present work. Complementary measurements of the density have been performed along seven isotherms in the temperature range from (298–363) K and pressures from (0.1–70) MPa. The density measurements were carried out with an Anton Paar vibrating U-tube densimeter and the raw data were corrected for viscosity effects. The density results were correlated with the temperature and pressure using a modified Tait equation. The expanded uncertainty of the present density data is estimated as ±0.2% at a 95% confidence level.pt_PT
dc.description.sponsorshipThis work was supported by the Project UID/QUI/00100/2013 and Project 21 UID/QUI/00100/2019 funded by Fundação para a Ciência e a Tecnologia (FCT), Portugal. 22 The authors are grateful to FCT, Portugal, for its support.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.fluid.2019.112354pt_PT
dc.identifier.issn0378-3812
dc.identifier.urihttp://hdl.handle.net/10400.2/11660
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherScience Directpt_PT
dc.relationCentro de Química Estrutural
dc.subjectIonic liquidpt_PT
dc.subjectViscositypt_PT
dc.subjectHigh pressurept_PT
dc.subjectVibrating wirept_PT
dc.titleViscosity measurements of 1-ethyl-3-methylimidazolium trifluoromethanesulfonate (EMIM OTf) at high pressures using the vibrating wire techniquept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentro de Química Estrutural
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FQUI%2F00100%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FQUI%2F00100%2F2019/PT
oaire.citation.startPage112354pt_PT
oaire.citation.titleFluid Phase Equilibriapt_PT
oaire.citation.volume505pt_PT
oaire.fundingStream5876
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.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication659a41ab-b9f0-4e51-a4ea-2558038f6148
relation.isAuthorOfPublication8efac795-4b7e-4b96-86ca-d8c612283ab7
relation.isAuthorOfPublicationf36ab422-62f8-4432-965c-73e36b0d25a2
relation.isAuthorOfPublication22e737b9-e5ab-460d-9200-5d088c622c08
relation.isAuthorOfPublication.latestForDiscoveryf36ab422-62f8-4432-965c-73e36b0d25a2
relation.isProjectOfPublication039cd23c-a06f-47df-b250-202e276a50bb
relation.isProjectOfPublication35a945f8-57c9-4764-82b1-bdacf76969fa
relation.isProjectOfPublication.latestForDiscovery039cd23c-a06f-47df-b250-202e276a50bb

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
sequeira2019.pdf
Size:
2.03 MB
Format:
Adobe Portable Document Format
Download

Collections

Ciências e Tecnologia | Artigos em revistas internacionais / Papers in international journals