Acidic Characterization of Copper Oxide and Niobium Pentoxide Supported on Silica–Alumina

dc.creatorGarcia, Fillipe Augusto da Costa
dc.creatorBraga, Valdeilson Souza
dc.creatorDias, José Alves
dc.creatorSilva, Júnia Chaves Marinho e
dc.creatorDias, Sílvia Cláudia Loureiro
dc.creatorDavo, Jorge L. B.
dc.creatorGarcia, Fillipe Augusto da Costa
dc.creatorBraga, Valdeilson Souza
dc.creatorDias, José Alves
dc.creatorSilva, Júnia Chaves Marinho e
dc.creatorDias, Sílvia Cláudia Loureiro
dc.creatorDavo, Jorge L. B.
dc.date.accessioned2011-12-14T12:02:30Z
dc.date.accessioned2022-10-07T15:02:01Z
dc.date.available2011-12-14T12:02:30Z
dc.date.available2022-10-07T15:02:01Z
dc.date.created2011-12-14T12:02:30Z
dc.date.issued2007
dc.identifier1572-879X
dc.identifierhttp://www.repositorio.ufba.br/ri/handle/ri/4849
dc.identifierv. 119
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/4003904
dc.description.abstractCopper oxide and niobium pentoxide were supported on silica–alumina with 2, 5, 10, 15 and 25 mass% loadings and 1:1 mass ratio of CuO:Nb2O5. XRD and BET measurements confirmed that monolayer coverage is reached with loadings between 5–10 mass%(~308 m2 g–1). The DRIFTS spectra of pyridine adsorbed catalysts showed bands associated with Bro¨nsted, Lewis and a combination of both acidic sites. Thermal analysis and liquid phase microcalorimetry provided the parameters for the best catalyst (10 mass%), which has the highest number of acidic sites (0.38 mmol g–1) and enthalpies of interaction with pyridine for Bro¨nsted and Lewis sites (DH1 = –107.5 and DH2 = –64.4 kJ mol–1, respectively).
dc.languageen
dc.subjectCopper oxide
dc.subjectNiobium pentoxide
dc.subjectLiquid phase microcalorimetry
dc.subjectAcidic characterization
dc.subjectSupported catalyst
dc.titleAcidic Characterization of Copper Oxide and Niobium Pentoxide Supported on Silica–Alumina
dc.typeArtigo de Periódico


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