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Artículo

Promoting effect of palladium on ZnAl2O4-supported catalysts based on cobalt or copper oxide on the activity for the total propene oxidation

Ocsachoque, Marco AntonioIcon ; Leguizamón Aparicio, María Silvia del ValleIcon ; Casella, Mónica LauraIcon ; Lick, Ileana DanielaIcon
Fecha de publicación: 25/08/2021
Editorial: Multidisciplinary Digital Publishing Institute
Revista: Materials
ISSN: 1996-1944
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Ingeniería de Procesos Químicos

Resumen

Palladium-modified Co-ZnAland Cu-ZnAl materials were used and found active for the catalytic oxidation of propene and propane. According to the results obtained by XRD, TPR and XPS, the zinc aluminate-supported phases are oxide phases, Co3 O4, CuO and PdOx for Co-ZnAl, Cu-ZnAl and Pd-ZnAl catalysts, respectively. These reducible oxide species present good catalytic activity for the oxidation reactions. The addition of palladium to Co-ZnAl or Cu-ZnAl samples promoted the reducibility of the system and, consequently, produced a synergic effect which enhanced the activity for the propene oxidation. The PdCo-ZnAl sample was the most active and exhibited highly dispersed PdOx particles and surface structural defects. In addition, it exhibited good catalytic stability. The H2 pre-treated PdCu-ZnAl, PdCo-ZnAl and Pd-ZnAl samples showed higher activity than the original oxide catalysts, evidencing the important role of the oxidation state of the species, mainly of the palladium species, on the catalytic activity for the propene combustion. The synergic effect between metal transition oxides and PdOx could not be observed for the propane oxidation.
Palabras clave: ZINC ALUMINATE , PALLADIUM , COBALT OXIDE , COPPER OXIDE , PROPENE CATALYTIC OXIDATION
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution 2.5 Unported (CC BY 2.5)
Identificadores
URI: http://hdl.handle.net/11336/172377
URL: https://www.mdpi.com/1996-1944/14/17/4814
DOI: http://dx.doi.org/10.3390/ma14174814
Colecciones
Articulos(CINDECA)
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Citación
Ocsachoque, Marco Antonio; Leguizamón Aparicio, María Silvia del Valle; Casella, Mónica Laura; Lick, Ileana Daniela; Promoting effect of palladium on ZnAl2O4-supported catalysts based on cobalt or copper oxide on the activity for the total propene oxidation; Multidisciplinary Digital Publishing Institute; Materials; 14; 17; 25-8-2021; 4814-4831
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