Improvement of carbon dioxide absorption by mixing poly(ethylene glycol) dimethyl ether with ammonium-based ionic liquids

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dc.contributor.authorLepre, L. F.
dc.contributor.authorPison, L.
dc.contributor.authorSiqueira, L. J. A. [UNIFESP]
dc.contributor.authorAndo, R. A.
dc.contributor.authorGomes, M. F. Costa
dc.date.accessioned2018-07-26T12:18:49Z
dc.date.available2018-07-26T12:18:49Z
dc.date.issued2018
dc.description.abstractMixtures of the ionic liquid butyltrimethylammonium bis(trifluoromethylsulfonyl)imide, [N-4111][NTf2] with poly(ethylene oxide) polymers, PEO, of different molecular weights were investigated for CO2 capture. The liquid mixtures are close to ideal in terms of their volumetric properties but their enthalpies of mixing are negative, decreasing when the size of the polymer chain increases and being close to those observed for associative compounds mixed with ionic liquids (Delta H-mix = -7 kJ mol(-1) for [N-4111][NTf2] + PEO1000 at 318 K). The favorable interactions between the polymer and the ionic liquid could be related to the dynamic properties of the mixtures, especially for mixtures of polymers of longer chain sizes which have a higher viscosity than that of the pure mixture components. Raman spectroscopy confirmed an association between the cation of the ionic liquid and the polymers that probably surround the cation and thus contribute to slow the dynamics of the mixtures. The increase of the carbon dioxide absorption with the increase of the polymer mole fraction composition in the liquid mixture is explained by the more favorable interactions between the gas and the polymer as evidenced by the analysis of the thermodynamic properties of solvation. (C) 2017 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Sao Paulo, Dept Quim Fundamental, Inst Quim, Lab Espect Mol, CP 26077, BR-05513970 Sao Paulo, Brazil
dc.description.affiliationCNRS, Inst Chim Clermont Ferrand, BP 80026, F-63171 Aubiere, France
dc.description.affiliationUniv Clermont Auvergne, BP 80026, F-63171 Aubiere, France
dc.description.affiliationUniv Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, Dept Ciencias Exatas & Terra, Lab Mat Hibridos, BR-09913030 Diadema, Brazil
dc.description.affiliationUnifespUniv Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, Dept Ciencias Exatas & Terra, Lab Mat Hibridos, BR-09913030 Diadema, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipFundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
dc.description.sponsorshipIDFAPESP: 2013/23234-7
dc.description.sponsorshipIDFAPESP: 2015/07145-0
dc.description.sponsorshipIDFAPESP: 2011/22263-8
dc.description.sponsorshipIDFAPESP: 2012/13119-3
dc.format.extent10-19
dc.identifierhttp://dx.doi.org/10.1016/j.seppur.2017.07.010
dc.identifier.citationSeparation And Purification Technology. Amsterdam, v. 196, p. 10-19, 2018.
dc.identifier.doi10.1016/j.seppur.2017.07.010
dc.identifier.issn1383-5866
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/46045
dc.identifier.wosWOS:000427211200003
dc.language.isoeng
dc.publisherElsevier Science Bv
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectButyltrimethylammonium bis(trifluorome thylsulfonyl)imideen
dc.subjectPEOen
dc.subjectExcess volumeen
dc.subjectMixing enthalpyen
dc.subjectSolubilityen
dc.subjectCarbon dioxideen
dc.subjectRaman spectroscopyen
dc.titleImprovement of carbon dioxide absorption by mixing poly(ethylene glycol) dimethyl ether with ammonium-based ionic liquidsen
dc.typeinfo:eu-repo/semantics/article
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