Artículo
Promoting effect of rhodium on Co/ZnAl2O4 catalysts for the catalytic combustion of hydrocarbons
Leguizamón Aparicio, María Silvia del Valle
; Ocsachoque, Marco Antonio
; Rodríguez Castellón, Enrique; Gazzoli, Delia; Casella, Mónica Laura
; Lick, Ileana Daniela
Fecha de publicación:
16/07/2021
Editorial:
Elsevier Science
Revista:
Catalysis Today
ISSN:
0920-5861
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Zinc aluminate (ZnAl) was used as support to obtain a series of rhodium-modified Co-ZnAl catalysts for the catalytic oxidation of propane and naphthalene. The catalysts were characterized by various techniques including N2 adsorption (BET), X-ray diffraction (XRD), temperature programmed reduction (TPR), diffuse reflectance spectroscopy (DRS), FTIR and X-ray photoelectron spectroscopy (XPS), to correlate chemical and physical characteristics with catalytic properties. TPR and XPS techniques show the presence of segregated cobalt compounds, as well as cobalt species interacting with the support. Segregated cobalt species are considered responsible for the catalytic activity, due to their high reducibility. The addition of Rh promotes the reducibility of the cobalt compounds yielding to an increase in the surface content of Co2+. For propane oxidation, the best activity shown by the Rh(0.5)Co(5)-ZnAl sample could be associated with a synergic effect between rhodium and cobalt species. No specific effects were revealed due to the addition rhodium for the naphthalene oxidation.
Palabras clave:
COBALT
,
NAPHTHALENE
,
OXIDATION
,
PROPANE
,
RHODIUM
,
ZINC ALUMINATE
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Articulos(CINDECA)
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Citación
Leguizamón Aparicio, María Silvia del Valle; Ocsachoque, Marco Antonio; Rodríguez Castellón, Enrique; Gazzoli, Delia; Casella, Mónica Laura; et al.; Promoting effect of rhodium on Co/ZnAl2O4 catalysts for the catalytic combustion of hydrocarbons; Elsevier Science; Catalysis Today; 372; 16-7-2021; 2-10
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