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Separation of alkane isomers in a hierarchically structured 3D-printed porous carbon monolith

2023Artigo científico Acesso aberto
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dc.contributor.authorHenrique, Adriano
dc.contributor.authorSteldinger, Hendryk
dc.contributor.authorDíaz de Tuesta, Jose Luis
dc.contributor.authorGlaesel, Jan
dc.contributor.authorRodrigues, Alírio
dc.contributor.authorGomes, Helder
dc.contributor.authorEtzold, Bastian J.M.
dc.contributor.authorSilva, José A.C.
dc.date.accessioned2020-04-23T10:09:30Z
dc.date.available2020-04-23T10:09:30Z
dc.date.issued2023
dc.description.abstractHierarchically structured 3D printed porous carbons monoliths, exhibiting cylinder structures composed of tetragonal cubic centered unit cells, were studied for their applicability in adsorptive pentane (C5) and hexane (C6) alkane isomers separation (linear/branched). Three materials of the same macroscopic shape were employed in the study, which varied in the micro- and mesoporosity by changing the final CO2 activation step: non-activated and activated at 1133 K for 6 and 12 h, respectively. Fixed bed breakthrough experiments were conducted for C5/C6 isomer feed mixtures, covering 373, 423, and 473 K temperatures and total alkane partial pressure up to 50.0 kPa. Results demonstrated that the initial porosity for the non-activated monolith enables the complete separation of linear from their respective branched isomers (slightly adsorbed) via a near molecular sieving effect, showing the following sorption hierarchy order (nC6 > nC5) >> > >> (2MP > 3MP > 23DMB approximate to iC5 > 22DMB). Regarding the CO2-activated monoliths, both showed a completely different picture, being all the alkane isomers adsorbed (much higher loadings) following the sorption hierarchy order: nC6 > 3MP > 2MP > 23DMB > 22DMB > nC5 > iC5. These results indicate that besides enhancing the microporosity and available specific surface area, the pore sieving effect of branched alkanes is lost due to the pore widening during the CO2 activation. The breakthrough data for the non-activated monolith is also numerically fitted with a convenient, dynamic adsorption model.pt_PT
dc.description.sponsorshipThe authors acknowledge financial support from: (1) project POCI01-0145-FEDER-016517 (PTDC/QEQ-PRS/3599/2014) funded by FEDER funds through COMPETE2020 and Fundaç˜ao para a Ciˆencia e a Tecnologia (FCT); (2) Project PTDC/EQU-EPQ/0467/2020; (3) FCT PhD scholarship to Adriano Henrique (SFRH/BD/148525/2019); (4) Joint financial support from FCT (Portugal) and DAAD (Germany); (5) National funds FCT/MCTES (PIDDAC) to CIMO (UIDB/00690/2020 and UIDP/00690/2020), SusTEC (LA/P/0007/2021), LSRE-LCM (UIDB/ 50020/2020 and UIDP/50020/2020), and ALiCE (LA/P/0045/2020). Jose L. Diaz De Tuesta acknowledges the financial support through the program of Atracci´on al Talento of Comunidad de Madrid (Spain) for the individual research grants 2020-T2/AMB-19836 and 2022-T1/AMB- 23946. The authors also acknowledge Dr. M. Rückriem and Dr. A. Schreiber from Microtrac Retsch GmbH for their kind support with nitrogen physisorption measurements.
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationHenrique, Adriano; Steldinger, Hendryk; Tuesta, Jose L. Diaz de; Glaesel, Jan; Rodrigues, Alírio; Gomes, Helder; Etzold, Bastian J.M.; Silva, José A.C. (2023). Separation of alkane isomers in a hierarchically structured 3D-printed porous carbon monolith. Chemical Engineering Journal. eISSN 1873-3212. 472, p. 1-11pt_PT
dc.identifier.doi10.1016/j.cej.2023.145138
dc.identifier.eissn1873-3212
dc.identifier.issn1385-8947
dc.identifier.urihttp://hdl.handle.net/10198/21797
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subject3D-printed carbon monolithspt_PT
dc.subjectC5/C6 alkane isomer separationpt_PT
dc.subjectFixed bed adsorptionpt_PT
dc.subjectMolecular sievingpt_PT
dc.subjectNumerical modelingpt_PT
dc.titleSeparation of alkane isomers in a hierarchically structured 3D-printed porous carbon monolithpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleChemical Engineering Journalpt_PT
person.familyNameHenrique
person.familyNameDíaz de Tuesta
person.familyNameGomes
person.familyNameSilva
person.givenNameAdriano
person.givenNameJose Luis
person.givenNameHelder T.
person.givenNameJosé A.C.
person.identifier.ciencia-idDB18-4E7D-6696
person.identifier.ciencia-id7A1F-022B-7DBF
person.identifier.ciencia-id6218-1E19-13EE
person.identifier.ciencia-idC11B-F5CF-7C78
person.identifier.orcid0000-0002-5227-9790
person.identifier.orcid0000-0003-2408-087X
person.identifier.orcid0000-0001-6898-2408
person.identifier.orcid0000-0003-1778-3833
person.identifier.ridD-9785-2017
person.identifier.scopus-author-id55755821600
person.identifier.scopus-author-id7403023684
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication8f18b8ea-087b-4626-b5f1-9b66b1aa993f
relation.isAuthorOfPublication2ad0465f-5f8a-4b14-90f5-bf85996f9ce1
relation.isAuthorOfPublication0eb96337-224a-4339-9918-334436fbbb99
relation.isAuthorOfPublication16366ede-a7d6-45ff-a8c9-eff9bdde35c7
relation.isAuthorOfPublication.latestForDiscovery16366ede-a7d6-45ff-a8c9-eff9bdde35c7

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