Repository logo
 
Publication

Hierarchical Zeolites Prepared Using a Surfactant-Mediated Strategy: ZSM-5 vs. Y as Catalysts for Friedel–Crafts Acylation Reaction

2024-01-20Journal article Open access
Simple item page
dc.contributor.authorMartins, Angela
dc.contributor.authorAmaro, Beatriz
dc.contributor.authorSantos, M. Soledade C. S.
dc.contributor.authorNunes, Nelson
dc.contributor.authorElvas Leitao, Ruben
dc.contributor.authorCarvalho, Ana P.
dc.date.accessioned2024-11-12T09:28:14Z
dc.date.available2024-11-12T09:28:14Z
dc.date.issued2024-01-20
dc.description.abstractHierarchical ZSM5 and Y zeolites were prepared through a surfactant-mediated strategy with NH4OH changing the duration of the treatment and the amount of CTAB surfactant and taking as reference multiples of the critical micellar concentration (CMC). The materials were characterized using powder X-ray diffraction, N2 adsorption isotherms at -196 degrees C, and SEM and TEM microscopy. The catalytic performance was evaluated in Friedel-Crafts acylation of furan with acetic anhydride at 80 degrees C. The alkaline surfactant-mediated treatment had different effects on the two zeolites. For ZSM5, the CTAB molecular aggregates can hardly diffuse inside the medium-size pores, leading mainly to intercrystalline mesoporosity and increased external surface area, with no positive catalytic impact. On the other hand, for large-pore Y zeolite, the CTAB molecular aggregates can easily diffuse and promote the rearrangement of crystal units around micelles, causing the enlargement of the pores, i.e., intracrystalline porosity. The optimized Y-based sample, treated for 12 h with a CTAB amount 32 times the CMC, shows an increase in product yield and rate constant that was not observed when a higher amount of surfactant was added. The reuse of spent catalysts upon thermal treatment at 400 ◦C shows a regeneration efficiency around 90%, showing good potentialities for the modified catalysts.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMartins A, Amaro B, Santos MSCS, Nunes N, Elvas-Leitão R, Carvalho AP. Hierarchical Zeolites Prepared Using a Surfactant-Mediated Strategy: ZSM-5 vs. Y as Catalysts for Friedel–Crafts Acylation Reaction. Molecules. 2024; 29(2):517. https://doi.org/10.3390/molecules29020517pt_PT
dc.identifier.doi10.3390/molecules29020517pt_PT
dc.identifier.eissn1420-3049
dc.identifier.urihttp://hdl.handle.net/10400.21/17881
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationLA/P/0056/2020 - Fundação para a Ciência e a Tecnologia (FCT)pt_PT
dc.relationCentro de Química Estrutural
dc.relationCentro de Química Estrutural
dc.relation.publisherversionhttps://www.mdpi.com/1420-3049/29/2/517pt_PT
dc.subjecthierarchical Y and ZSM5 zeolitespt_PT
dc.subjectsurfactant-mediated strategypt_PT
dc.subjectFriedel–Crafts acylationpt_PT
dc.subjectfuranpt_PT
dc.subjectkinetic parameterspt_PT
dc.titleHierarchical Zeolites Prepared Using a Surfactant-Mediated Strategy: ZSM-5 vs. Y as Catalysts for Friedel–Crafts Acylation Reactionpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentro de Química Estrutural
oaire.awardTitleCentro de Química Estrutural
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00100%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F00100%2F2020/PT
oaire.citation.endPage15pt_PT
oaire.citation.issue2pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleMoleculespt_PT
oaire.citation.volume29pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
person.familyNameMartins
person.familyNameNunes
person.familyNameElvas Leitao
person.givenNameAngela
person.givenNameNelson
person.givenNameRuben
person.identifier1344292
person.identifier.ciencia-id781F-79D3-9070
person.identifier.ciencia-id1B16-7872-5A09
person.identifier.ciencia-idF41B-8A26-88D4
person.identifier.orcid0000-0003-1637-478X
person.identifier.orcid0000-0003-4499-0379
person.identifier.orcid0000-0002-2196-412X
person.identifier.ridB-1775-2012
person.identifier.ridA-8516-2012
person.identifier.ridD-2452-2009
person.identifier.scopus-author-id7203013509
person.identifier.scopus-author-id11540776800
person.identifier.scopus-author-id55667178200
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.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication61c012c2-e555-4d7e-8fad-27b1facc34ca
relation.isAuthorOfPublication3541747c-0373-4a73-b1f3-77095e675385
relation.isAuthorOfPublication440b7129-d4d9-4225-a936-ca694c0984b6
relation.isAuthorOfPublication.latestForDiscovery61c012c2-e555-4d7e-8fad-27b1facc34ca
relation.isProjectOfPublication4ca2f791-5aae-48f8-ac70-bde2e34d442a
relation.isProjectOfPublication3fd80218-cd4e-4e84-8085-013e270408cd
relation.isProjectOfPublication.latestForDiscovery4ca2f791-5aae-48f8-ac70-bde2e34d442a

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Hierarchical_AMartins.pdf
Size:
2.66 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ISEL - Eng. Quim. Biol. - Artigos