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Enhancement of CO2/N2 selectivity and CO2 uptake by tuning concentration and chemical structure of imidazolium-based ILs immobilized in mesoporous silica

2020-02-03Journal article Restricted access
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dc.contributor.authorDuczinski, Rafael
dc.contributor.authorPolesso, Barbara B.
dc.contributor.authorBernard, Franciele L.
dc.contributor.authorFerrari, Henrique Z.
dc.contributor.authorAlmeida, Pedro L.
dc.contributor.authorCorvo, Marta C.
dc.contributor.authorCabrita, Eurico J
dc.contributor.authorMenezes, Sónia
dc.contributor.authorEinloft, Sandra
dc.date.accessioned2020-04-14T14:51:32Z
dc.date.available2020-04-14T14:51:32Z
dc.date.issued2020-02-03
dc.description.abstractImidazolium-based ionic liquids (ILs) with different cation alkyl chain ([i-C5mim] or [C4mim]) and inorganic anions ([Cl−], [Tf2N−], [PF6−] and [DCA−]) were synthesized and immobilized in commercial mesoporous silica. The synthesized supported ILs (SILs) were characterized using NMR, FTIR, TGA, BET, SEM and TEM. CO2 sorption capacity, reusability and CO2/N2 selectivity were assessed by the pressure-decay technique. The effects of IL concentration, cation and anion chemical structure in CO2 sorption capacity and CO2/N2 separation performance wereevaluated. Tests evidencedthatthe presenceofbranching on thecation alkylsidechainincreases CO2/N2 selectivity. The immobilization of the IL [i-C5TPIm][Cl] on mesoporous silica in different concentrations (50, 20, 10 and 5 %) revealed that lower IL concentration results in higher CO2 sorption capacity. Immobilization of ILs containing fluorinated anions at low concentrations in the mesoporous silica support may promote the improvement of the CO2/N2 selectivity without interfering on CO2 sorption capacity of the original support. CO2 sorption capacity value shown by sample SIL-5 % - [i-C5TPIm][Tf2N] (79.50 ± 0.70mg CO2 g-1) was close to the value obtained for the pristine mesoporous silica (81.70 ± 2.20mg CO2g-1) and the selectivity (4.30 ± 0.70) was more than twice of the one obtained for the support alone (2.32 ± 0.4). Recycle tests demonstrated that the ILs immobilized in mesoporous silica samples are stable, providing a new option to be used in CO2 capture processes.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationDUCZINSKI, Rafael; [et al] – Enhancement of CO2/N2 selectivity and CO2 uptake by tuning concentration and chemical structure of imidazolium-based ILs immobilized in mesoporous sílica. Journal of Environmental Chemical Engineering. ISSN 2213-3437. Vol. 8, N.º 3 (2020), pp. 1-11pt_PT
dc.identifier.doihttps://doi.org/10.1016/j.jece.2020.103740pt_PT
dc.identifier.issn2213-3437
dc.identifier.urihttp://hdl.handle.net/10400.21/11452
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationPTDC/QUIQFI/31508/2017pt_PT
dc.relationROTEIRO/0031/2013pt_PT
dc.relationPINFRA/ 22161/2016pt_PT
dc.relationPOCI-01-0145FEDER-007688pt_PT
dc.relationInstitute of Nanostructures, Nanomodelling and Nanofabrication
dc.relationApplied Molecular Biosciences Unit
dc.subjectImmobilizationpt_PT
dc.subjectIonic liquidspt_PT
dc.subjectCO2 capturept_PT
dc.titleEnhancement of CO2/N2 selectivity and CO2 uptake by tuning concentration and chemical structure of imidazolium-based ILs immobilized in mesoporous silicapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleInstitute of Nanostructures, Nanomodelling and Nanofabrication
oaire.awardTitleApplied Molecular Biosciences Unit
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FCTM%2F50025%2F2019/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMulti%2F04378%2F2019/PT
oaire.citation.endPage11pt_PT
oaire.citation.issue3
oaire.citation.startPage1pt_PT
oaire.citation.titleJournal of Environmental Chemical Engineeringpt_PT
oaire.citation.volume8pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
person.familyNameDuczinski
person.familyNameMarques de Almeida
person.familyNameCorvo
person.familyNameCabrita
person.familyNameEinloft
person.givenNameRafael
person.givenNamePedro
person.givenNameMarta Cristina Parracho Cançado
person.givenNameEurico
person.givenNameSandra
person.identifier.ciencia-id0218-71B2-2DE0
person.identifier.ciencia-idBA1A-5C94-CA3A
person.identifier.ciencia-id4814-5DDB-D43D
person.identifier.orcid0000-0002-1865-979X
person.identifier.orcid0000-0001-7356-8455
person.identifier.orcid0000-0003-0890-6133
person.identifier.orcid0000-0002-0720-2751
person.identifier.orcid0000-0003-1364-0325
person.identifier.ridB-4356-2009
person.identifier.ridE-8053-2011
person.identifier.ridG-1565-2012
person.identifier.scopus-author-id57190384213
person.identifier.scopus-author-id6602470713
person.identifier.scopus-author-id56227228000
person.identifier.scopus-author-id6602323155
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.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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