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Experimental and dynamic modeling study of CO2/N2 separation on ion-exchanged binder-free LTA zeolites for post-combustion carbon capture

2026Artigo científico Acesso aberto
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datacite.subject.fosEngenharia e Tecnologia::Engenharia Química
datacite.subject.fosEngenharia e Tecnologia::Engenharia dos Materiais
datacite.subject.fosEngenharia e Tecnologia::Engenharia do Ambiente
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
datacite.subject.sdg13:Ação Climática
datacite.subject.sdg04:Educação de Qualidade
dc.contributor.authorKarimi, Mohsen
dc.contributor.authorAly, Ezzeldin
dc.contributor.authorRodrigues, Alírio E.
dc.contributor.authorFreitas, Francisco A. Da Silva
dc.contributor.authorSilva, José A.C.
dc.date.accessioned2026-02-24T15:18:37Z
dc.date.available2026-02-24T15:18:37Z
dc.date.issued2026
dc.description.abstractIon-exchange modification of commercial binder-free zeolites offers a promising strategy to improve adsorption-based CO2 capture from post-combustion flue gases. In this study, the CO2/ N-2 separation performance of ion-exchanged binder-free Linde-Type A (LTA) zeolites-namely 4 A, 5 A, Sr(40)A, and Sr(80)A-was systematically evaluated under post-combustion capture (PCC) conditions. Adsorption isotherms were measured over the temperature range of 306-344 K and pressures up to 350 kPa. The CO2 uptake followed the order: 5 A > Sr(40)A > Sr(80)A > 4 A, with 5 A achieving the highest loading of 5.58 mol center dot kg(-1) at 120 kPa and 306 K, compared to 4.47 mol center dot kg(-1) for Sr(40)A, 4.45 mol center dot kg(-1) for Sr(80)A, and 3.73 mol center dot kg(-1) for 4 A. The presence of divalent cations (Ca2+ and Sr2+) strengthened the electrostatic interactions, thereby enhancing CO2 affinity relative to the Na-exchanged 4 A. Binary CO2/N-2 breakthrough experiments demonstrated that Sr(80)A exhibited the highest selectivity (75 at 10 kPa and 306 K), followed by 5 A (60), 4 A (51), and Sr(40)A (47). Which the developed mathematical model accurately captured the breakthrough behavior and dynamic performance of the fixed-bed system. Finally, a Response Surface Methodology (RSM) was applied to the statistical analysis of selectivity of different studied zeolites and getting the optimum operating conditions.eng
dc.description.sponsorshipThis work was supported by national funds through FCT/MCTES (PIDDAC): CIMO UID/00690/2025 (10.54499/UID/00690/2025) and UID/PRR/00690/2025 (10.54499/UID/PRR/00690/2025); SusTEC, LA/P/0007/2020 (DOI: 10.54499/LA/P/0007/2020); and (3) CICECO – Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020, and LA/P/0006/2020. The authors also gratefully acknowledge Kristin Gleichmann and Chemiewerk Bad Köstritz GmbH, Heinrichshall, Germany for valuable support in providing the binder-free LTA zeolite samples used in this study.
dc.identifier.citationKarimi, Mohsen; Aly, Ezzeldin; Rodrigues, Alírio E.; Freitas, Francisco A. Da Silva; Silva, José A. C. (2026). Experimental and dynamic modeling study of CO2/N2 separation on ion-exchanged binder-free LTA zeolites for post-combustion carbon capture. Separation and Purification Technology. ISSN 1383-5866. 391, p. 1-13
dc.identifier.doi10.1016/j.seppur.2026.137050
dc.identifier.issn1383-5866
dc.identifier.urihttp://hdl.handle.net/10198/35843
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationMountain Research Center
dc.relationAssociate Laboratory for Sustainability and Tecnology in Mountain Regions
dc.relationCICECO-Aveiro Institute of Materials
dc.relation.ispartofSeparation and Purification Technology
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subjectZeolite
dc.subjectIon-exchange
dc.subjectBreakthrough experiments
dc.subjectResponse surface methodology
dc.subjectNet zero emissions
dc.titleExperimental and dynamic modeling study of CO2/N2 separation on ion-exchanged binder-free LTA zeolites for post-combustion carbon captureeng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleMountain Research Center
oaire.awardTitleAssociate Laboratory for Sustainability and Tecnology in Mountain Regions
oaire.awardTitleCICECO-Aveiro Institute of Materials
oaire.awardURIhttp://hdl.handle.net/10198/35759
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0007%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50011%2F2020/PT
oaire.citation.endPage13
oaire.citation.startPage1
oaire.citation.titleSeparation and Purification Technology
oaire.citation.volume391
oaire.fundingStreamCIMO
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameAly
person.familyNameSilva
person.givenNameEzzeldin
person.givenNameJosé A.C.
person.identifier.ciencia-idC11B-F5CF-7C78
person.identifier.orcid0000-0003-4840-2597
person.identifier.orcid0000-0003-1778-3833
person.identifier.scopus-author-id7403023684
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
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