Artigo de Periódico
Palladium-supported catalysts in methane combustion. Comparison of alumina and zirconia supports
Fecha
2012Registro en:
0100-4042
v. 35, n. 6
Autor
Domingos, Daniela
Rodrigues, Lílian Maria Tosta Simplício
Brandão, Soraia Teixeira
Rocha, Maria da Graça Carneiro da
Frety, Roger
Institución
Resumen
Palladium catalysts supported on alumina and zirconia were prepared by the impregnation method and calcined at 600 and 1000 ºC. Catalysts were characterized by BET measurements, XRD, XPS, O2-TPD and tested in methane combustion through temperature programmed surface reaction. Alumina supported catalysts were slightly more active than zirconia supported catalysts, but after initial heat treatment at 1000 ºC, zirconia supported palladium catalyst showed better performance above 500 ºC A pattern between temperature interval stability of PdOx species and activity was observed, where better PdOx stability was associated with more active catalysts.