Characterization of the porosity developed in a new titania-alumina catalyst support prepared by the sol gel route

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dc.contributor.authorKaneko, E. Y.
dc.contributor.authorPulcinelli, Sandra Helena [UNESP]
dc.contributor.authorSantilli, Celso Valentim [UNESP]
dc.contributor.authorCraievich, A. F.
dc.contributor.authorChiaro, SSX
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionPetrobras SA
dc.date.accessioned2014-05-20T15:22:38Z
dc.date.available2014-05-20T15:22:38Z
dc.date.issued2003-06-01
dc.description.abstractTitanium oxide (TiO2) is a good candidate for support of hydrotreating catalysts but has the disadvantage of presenting a low surface area and a poor thermal stability when compared with Al2O3. A mixed TiO2-Al2O3 support was proposed as an alternative that is expected to be free from these drawbacks. The variation during firing of the nanoporous texture of supports composed of TiO2-Al2O3, TiO2 and Al2O3 was studied by small angle X-ray scattering (SAXS). The supports were prepared by the sol-gel route using Ti and Al isopropoxides. We have particularly analyzed the effects of acid and basic hydrolysis on the nanostructural features of catalyst supports fired at different temperatures. The nanopore radius distribution functions were determined from SAXS results assuming a simple model of spherical nanopores embedded in a homogeneous solid matrix. The modal pore radius in both pure TiO2 and pure Al2O3 supports grows from 1.3 to 2.2 nm as the firing temperature increases from 673 to 973 K. on the other hand, the modal pore radius in the mixed TiO2-Al2O3 support remains below 1.2 nm over the same range of firing temperatures. These results demonstrate the good thermal stability of the nanoporous texture of mixed TiO2-Al2O3 supports.en
dc.description.affiliationUNESP, Inst Quim, BR-14800970 Araraquara, SP, Brazil
dc.description.affiliationUSP, Inst Fis, BR-09500900 São Paulo, Brazil
dc.description.affiliationPetrobras SA, CENPES, Rio de Janeiro, Brazil
dc.description.affiliationUnespUNESP, Inst Quim, BR-14800970 Araraquara, SP, Brazil
dc.format.extent469-472
dc.identifierhttp://dx.doi.org/10.1107/S0021889803003819
dc.identifier.citationJournal of Applied Crystallography. Copenhagen: Blackwell Munksgaard, v. 36, p. 469-472, 2003.
dc.identifier.doi10.1107/S0021889803003819
dc.identifier.issn0021-8898
dc.identifier.lattes9971202585286967
dc.identifier.lattes5584298681870865
dc.identifier.orcid0000-0002-8356-8093
dc.identifier.urihttp://hdl.handle.net/11449/33579
dc.identifier.wosWOS:000182284400019
dc.language.isoeng
dc.publisherBlackwell Munksgaard
dc.relation.ispartofJournal of Applied Crystallography
dc.relation.ispartofsjr1,635
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectcatalyst supportspt
dc.subjectsol-gelpt
dc.subjectnanoporous texturept
dc.titleCharacterization of the porosity developed in a new titania-alumina catalyst support prepared by the sol gel routeen
dc.typeArtigo
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dcterms.rightsHolderBlackwell Munksgaard
unesp.author.lattes9971202585286967
unesp.author.lattes5584298681870865[3]
unesp.author.orcid0000-0002-8356-8093[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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Artigos - Físico Química - IQ