dc.creatorPinheiro Sena, Maiana
dc.creatorPereira de Lima, Simone
dc.creatorSantos Carvalho, Luciene
dc.creatorRuiz, Doris
dc.creatorBallarini, Adriana Daniela
dc.creatorMartins, André Rosa
dc.date.accessioned2021-11-02T12:50:15Z
dc.date.accessioned2022-10-14T22:25:59Z
dc.date.available2021-11-02T12:50:15Z
dc.date.available2022-10-14T22:25:59Z
dc.date.created2021-11-02T12:50:15Z
dc.date.issued2020-09
dc.identifierPinheiro Sena, Maiana; Pereira de Lima, Simone; Santos Carvalho, Luciene; Ruiz, Doris; Ballarini, Adriana Daniela; et al.; Synthesis, characterization and catalytic evaluation of cobalt and niobium oxide solids modified with alkaline earth metals; Universidade Federal do Rio de Janeiro; Matéria; 25; 3; 9-2020; 1-10
dc.identifier1517-7076
dc.identifierhttp://hdl.handle.net/11336/145703
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4313777
dc.description.abstractCobalt and niobium oxide solids modified with alkaline earth metals (Mg, Ca, and Sr) were synthesized and characterized to compare the second element effect on the catalyst structural and chemical properties. The materials were prepared by co-precipitation of cobalt nitrate and niobium oxalate solutions using ammonium hydroxide as precipitating agent. The samples were characterized by XRD, SEM, Ra-man, BET, TPR, ammonia TPD and cyclohexane dehydrogenation reaction (CHD). Results showed that Mg, Ca or Sr addition changed cobalt niobate crystalline structure, leading to alkaline earth metal nio-bates with lower crystallinity. It was observed that Mg, Ca or Sr increased the solids acidity and changed cobalt niobate reduction behavior so that the lowest amount of metallic cobalt was obtained when Mg was incorporated. Modifiers also decreased cobalt niobate dehydrogenation activity. This effect was higher with Mg or Sr addition.
dc.languageeng
dc.publisherUniversidade Federal do Rio de Janeiro
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1590/s1517-707620200003.1129
dc.rightshttps://creativecommons.org/licenses/by/2.5/ar/
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectCOBALT NIOBATE, ALKALINE EARTH METALS
dc.subjectCYCLOHEXANE DEHYDROGENATION
dc.subjectTPR
dc.subjectXRD
dc.titleSynthesis, characterization and catalytic evaluation of cobalt and niobium oxide solids modified with alkaline earth metals
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


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