Brasil | Artículos de revistas

Effects of Cu over Pd based catalysts supported on silica or niobia

dc.creatorRoma, M.N.S.C.
dc.creatorCunha, D.S.
dc.creatorCruz, G.M.
dc.creatorCobo, A.J.G.
dc.date2000-12-01
dc.date2014-07-17T17:37:46Z
dc.date2015-11-26T13:20:42Z
dc.date2014-07-17T17:37:46Z
dc.date2015-11-26T13:20:42Z
dc.date.accessioned2018-03-28T21:04:08Z
dc.date.available2018-03-28T21:04:08Z
dc.identifierBrazilian Journal of Chemical Engineering. Brazilian Society of Chemical Engineering, v. 17, n. 4-7, p. 937-946, 2000.
dc.identifier0104-6632
dc.identifierS0104-66322000000400058
dc.identifier10.1590/S0104-66322000000400058
dc.identifierhttp://dx.doi.org/10.1590/S0104-66322000000400058
dc.identifierhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322000000400058
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/26089
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/26089
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1239736
dc.descriptionPalladium and palladium-copper catalysts supported on silica and niobia were characterized by H2 chemisorption and H2-O2 titration. Systems over silica were also analyzed by transmission electron microscopy and EXAFS. The metallic dispersion decreased from 20% to 7% when the content of Pd was increased from 0.5wt.-% to 3wt.-% in monometallic catalysts. The addition of 3 wt.-% Cu to obtain Pd-Cu catalysts caused a remarkable capacity loss of hydrogen chemisorption. TPR analysis suggested an interaction between the two metals and EXAFS characterization of the catalyst supported on silica confirmed the formation of Pd-Cu alloy. Pd/Nb2O5 catalysts showed turnover numbers higher than those obtained with the Pd/SiO2 systems in the cyclohexane dehydrogenation. However, the bimetallic catalysts showed very low turnover numbers.
dc.description937
dc.description946
dc.languageen
dc.publisherBrazilian Society of Chemical Engineering
dc.relationBrazilian Journal of Chemical Engineering
dc.rightsaberto
dc.sourceSciELO
dc.subjectbimetallic catalysts
dc.subjectpalladium-copper
dc.subjectniobia
dc.subjectsilica
dc.subjectcyclohexane dehydrogenation
dc.titleEffects of Cu over Pd based catalysts supported on silica or niobia
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución