Repository logo
 
Publication

Friedel-crafts acylation reaction over hierarchical Y zeolite modified through surfactant mediated technology

2021-08Journal article Restricted access
Simple item page
dc.contributor.authorMartins, Angela
dc.contributor.authorNeves, Vera
dc.contributor.authorMoutinho, João
dc.contributor.authorNunes, Nelson
dc.contributor.authorCarvalho, Ana
dc.date.accessioned2021-10-06T11:05:47Z
dc.date.available2021-10-06T11:05:47Z
dc.date.issued2021-08
dc.description.abstractFriedel-Crafts acylation reaction was studied under mild conditions using hierarchical HY zeolite samples prepared through surfactant mediated technology, in the presence of NH4OH, using CTAB or DTAB as surfactants and changing the duration of treatment from 6 to 48 h. The materials were characterized by powder X-ray diffraction, low temperature N2 adsorption isotherms, SEM microscopy and pyridine adsorption followed by FTIR. The catalytic behaviour was studied in the acylation of furan by acetic anhydride. The catalytic results reflect the role of the duration of the treatment as well as the surfactant molecule used. As the time of treatment increases, the enlargement of the pores leads to an increase of the rate constant and turnover frequency (TOF), except for sample modified during longer time, 48 h, due to the occurrence of secondary reactions that produce larger products or reaction intermediates that become trapped inside the pores. The role of the surfactant molecule is also relevant since the sample modified in the presence of the larger surfactant molecule, CTAB, a significant increase in product yield and rate constant is obtained when compared with the sample prepared in the same conditions using DTAB. However, in that case, by prolonging the treatment a substantial decrease in the same parameters occurs due to the occurrence of deactivation phenomena, pointing out that the optimized modification of porosity needs to be customized according to the needs of each catalytic system.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMARTINS, Ângela; [et al] – Friedel-crafts acylation reaction over hierarchical Y zeolite modified through surfactant mediated technology. Microporous and Mesoporous Materials. ISSN 1387-1811. Vol. 323 (2021), pp. 1-8pt_PT
dc.identifier.doi10.1016/j.micromeso.2021.111167pt_PT
dc.identifier.eissn1873-3093
dc.identifier.issn1387-1811
dc.identifier.urihttp://hdl.handle.net/10400.21/13825
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationCentro de Química Estrutural
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S1387181121002936?via%3Dihubpt_PT
dc.subjectHierarchical Y zeolitept_PT
dc.subjectSurfactant mediated technologypt_PT
dc.subjectFriedel-crafts acylationpt_PT
dc.subjectKinetic parameterspt_PT
dc.titleFriedel-crafts acylation reaction over hierarchical Y zeolite modified through surfactant mediated technologypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentro de Química Estrutural
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00100%2F2020/PT
oaire.citation.endPage8pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleMicroporous and Mesoporous Materialspt_PT
oaire.citation.volume323pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameMartins
person.familyNameNunes
person.familyNameCarvalho
person.givenNameAngela
person.givenNameNelson
person.givenNameAna
person.identifier1344292
person.identifier.ciencia-id781F-79D3-9070
person.identifier.ciencia-id1B16-7872-5A09
person.identifier.ciencia-id8011-6264-7957
person.identifier.orcid0000-0003-1637-478X
person.identifier.orcid0000-0003-4499-0379
person.identifier.orcid0000-0002-3144-2800
person.identifier.ridB-1775-2012
person.identifier.ridA-8516-2012
person.identifier.scopus-author-id7203013509
person.identifier.scopus-author-id11540776800
person.identifier.scopus-author-id55611516400
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication61c012c2-e555-4d7e-8fad-27b1facc34ca
relation.isAuthorOfPublication3541747c-0373-4a73-b1f3-77095e675385
relation.isAuthorOfPublication5d0d14e6-8215-4437-9957-ca9185c04b66
relation.isAuthorOfPublication.latestForDiscovery61c012c2-e555-4d7e-8fad-27b1facc34ca
relation.isProjectOfPublication4ca2f791-5aae-48f8-ac70-bde2e34d442a
relation.isProjectOfPublication.latestForDiscovery4ca2f791-5aae-48f8-ac70-bde2e34d442a

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Friedel-Crafts_AMartins.pdf
Size:
4.31 MB
Format:
Adobe Portable Document Format
Download

Collections

ISEL - Eng. Quim. Biol. - Artigos