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Enhancing CO2/N2 and CO2/CH4 Separation Properties of PES/SAPO-34 Membranes Using Choline Chloride-Based Deep Eutectic Solvents as Additives

2024Journal article Open access
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dc.contributor.authorCardoso, Jonathan S.
dc.contributor.authorLin, Zhi
dc.contributor.authorBrito, Paulo
dc.contributor.authorGando-Ferreira, Licínio M.
dc.date.accessioned2024-12-20T16:35:50Z
dc.date.available2024-12-20T16:35:50Z
dc.date.issued2024
dc.description.abstractCO2 separation is an important environmental method mainly used in reducing CO2 emissions to mitigate anthropogenic climate change. The use of mixed-matrix membranes (MMMs) arrives as a possible answer, combining the high selectivity of inorganic membranes with high permeability of organic membranes. However, the combination of these materials is challenging due to their opposing nature, leading to poor interactions between polymeric matrix and inorganic fillers. Many additives have been tested to reduce interfacial voids, some of which showed potential in dealing with compatibility problems, but most of them lack further studies and optimization. Deep eutectic solvents (DESs) have emerged as IL substitutes since they are cheaper and environmentally friendly. Choline chloride-based deep eutectic solvents were studied as additives in polyethersulfone (PES)/SAPO-34 membranes to improve CO2 permeability and CO2/N2 and CO2/CH4 selectivity. SAPO-34 crystals of 150 nm with a high surface area and microporosity were synthesized using dry-gel methodology. The PES/SAPO-34 membranes were optimized following previous work and used in a defined composition, using 5 or 10 w/w% of DES during membrane preparation. All MMMs were characterized by their ideal gas permeability using N2 and CO2 pure gasses. Selected membranes were also tested using CH4 pure gas. The results presented that 5 w/w%, in polymer mass, of ChCl–glycerol presented the best result over the synthesized membranes. An increase of 200% in CO2 permeability maintains the CO2/N2 selectivity for the non-modified PES/SAPO-34 membrane. A CO2/CH4 selectivity of 89.7 was obtained in PES/SAPO-34/ChClglycerol membranes containing 5 w/w% of this DES, which is an outstanding ideal separation performance for MMMs when compared to other results in the literature. FTIR analysis reiterates the presence of glycerol in the membranes prepared. Dynamic Mechanical Thermal Analysis (DMTA) shows that the addition of 5 w/w% of DES does not impact the membrane flexibility or polymer structure. However, in concentrations higher than 10 w/w%, the inclusion of DES could lead to high membrane rigidification without impacting the overall thermal resistance. SEM analysis of DESenhanced membranes presented asymmetric final membranes and reaffirmed the results obtained in DMTA about rigidified structures and lower zeolite–polymer interaction with higher concentrations of DES.pt_PT
dc.description.sponsorshipThe authors gratefully acknowledge the fundings from the Strategic Project of CERES (UIDB/00102/2020), CICECO-Aveiro Institute of Materials (UIDB/50 011/2020, UIDP/50 011/2020, and LA/P/0 0 06/2020), CIMO (UIDB/00690/2020 and UIDP/00690/2020), and SusTEC (LA/P/0007/ 2021), financed by the Fundação para a Ciência e Tecnologia (FCT) through national funds. J. S. Cardoso is also grateful for the financial support of the FCT through PhD grants (SFRH/BD/148170/2019 and COVID/BD/153647/2024).pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCardoso, Jonathan S.; Lin, Zhi; Brito, Paulo; Gando-Ferreira, Licínio M. (2024). Enhancing CO2/N2 and CO2/CH4 Separation Properties of PES/SAPO-34 Membranes Using Choline Chloride-Based Deep Eutectic Solvents as Additives. Membranes. ISSN 2077-0375. 14:11, p. 1-16pt_PT
dc.identifier.doi10.3390/membranes14110230pt_PT
dc.identifier.issn2077-0375
dc.identifier.urihttp://hdl.handle.net/10198/30783
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationChemical Process Engineering and Forest Products Research Centre
dc.relationCICECO-Aveiro Institute of Materials
dc.relationCICECO-Aveiro Institute of Materials
dc.relationCICECO – Aveiro Institute of Materials
dc.relationMountain Research Center
dc.relationMountain Research Center
dc.relationAssociate Laboratory for Sustainability and Tecnology in Mountain Regions
dc.relationDevelopment of mixed matrix zeolite membranes functionalized with ionic liquids for CO2 separation
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectMixed-matrix membranespt_PT
dc.subjectPESpt_PT
dc.subjectSAPO-34pt_PT
dc.subjectSeep eutectic solventspt_PT
dc.subjectInterfacial voidspt_PT
dc.titleEnhancing CO2/N2 and CO2/CH4 Separation Properties of PES/SAPO-34 Membranes Using Choline Chloride-Based Deep Eutectic Solvents as Additivespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleChemical Process Engineering and Forest Products Research Centre
oaire.awardTitleCICECO-Aveiro Institute of Materials
oaire.awardTitleCICECO-Aveiro Institute of Materials
oaire.awardTitleCICECO – Aveiro Institute of Materials
oaire.awardTitleMountain Research Center
oaire.awardTitleMountain Research Center
oaire.awardTitleAssociate Laboratory for Sustainability and Tecnology in Mountain Regions
oaire.awardTitleDevelopment of mixed matrix zeolite membranes functionalized with ionic liquids for CO2 separation
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00102%2F2020/PT
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oaire.awardURIinfo:eu-repo/grantAgreement/FCT//COVID%2FBD%2F153647%2F2024/PT
oaire.citation.endPage16pt_PT
oaire.citation.issue11pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleMembranespt_PT
oaire.citation.volume14pt_PT
oaire.fundingStream6817 - DCRRNI ID
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person.familyNameBrito
person.givenNamePaulo
person.identifier.ciencia-idA31A-D845-A6E2
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rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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