Artículo
Synthesis and catalytic activity of manganese dioxide (type OMS-2) for the abatement of oxygenated VOCs
Peluso, Miguel Andrés
; Gambaro, Luis Alberto
; Pronsato, Maria Estela
; Gazolli, Delia; Thomas, Horacio Jorge
; Sambeth, Jorge Enrique
Fecha de publicación:
12/2008
Editorial:
Elsevier Science
Revista:
Catalysis Today
ISSN:
0920-5861
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Two solids were synthesized by the reaction between Mn2+ and KMnO4 in different order. The results of the characterization of both solids showed that: (i) they are poorly crystalline, although both belong to the Cryptomelane (OMS-2) phase; (ii) these materials are mesoporous (mesopores concentration in the order of 80%); (iii) they contain the couple Mn3+/Mn4+, being the Mn3+ concentration a function of the preparation method. Both catalysts were analyzed in the total oxidation of ethanol and the percentage of ethanol conversion on both solids reached 50% at 155 °C. The adsorption studies of methanol and ethanol have demonstrated the presence of basic sites and two different adsorption sites. The analysis of the results suggest that the amount of adsorbed ethanol molecules and the lowest temperature of CO2 desorption detected is due to the Mn3+ concentration. This phenomenon is ascribed to a high concentration of Mn3+ which could originate a weak Mn–O bond and the formation of more active oxygen species which would improve the catalytic performance.
Palabras clave:
Cryptomelane
,
Manganese Oxide
,
Tpd-Ms
,
Vocs Elimination
Archivos asociados
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Colecciones
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"
Articulos(IFISUR)
Articulos de INSTITUTO DE FISICA DEL SUR
Articulos de INSTITUTO DE FISICA DEL SUR
Citación
Peluso, Miguel Andrés; Gambaro, Luis Alberto; Pronsato, Maria Estela; Gazolli, Delia; Thomas, Horacio Jorge; et al.; Synthesis and catalytic activity of manganese dioxide (type OMS-2) for the abatement of oxygenated VOCs; Elsevier Science; Catalysis Today; 133-135; 12-2008; 487-492
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