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Artículo

Different oxides used as diffusion barriers in composite hydrogen permeable membranes

Yepes, D.; Cornaglia, Laura MariaIcon ; Irusta, S.; Lombardo, Eduardo AgustinIcon
Fecha de publicación: 04/2006
Editorial: Elsevier Science
Revista: Journal of Membrane Science
ISSN: 0376-7388
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Ingeniería Medioambiental y Geológica, Geotécnicas

Resumen

Composite Pd-Ag membranes supported on modified porous stainless steel substrates were prepared by sequential electroless plating. To improve the stability of the Pd-Ag alloy, two different intermediate layers of α-Fe2O3 and γ-Al2O3 oxides were employed as diffusion barriers. A new activation method was also investigated which consisted in the impregnation of a layer of Pd supported γ-Al2O3 to generate palladium seeds. The membranes were studied by XRD, Auger depth profiling, SEM and EPMA. They were tested in a gas permeation system to determine the hydrogen permeability and selectivity. The Pd-Ag/PSS membranes had a good thermal resistance. The membranes prepared with alumina diffusion barriers exhibited lower ideal selectivity than the Pd-Ag/α-Fe2O3/PSS. However, the former membranes had two times higher hydrogen permeability. The Auger depth profiles did not show the presence of Fe in the Pd-Ag film, indicating that the γ-Al 2O3 layer effectively blocked the intermetallic diffusion.
Palabras clave: Alumina Layer , Diffusion Barrier , Pd-Ag Membrane
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/74319
DOI: http://dx.doi.org/10.1016/j.memsci.2005.08.003
URL: https://www.sciencedirect.com/science/article/pii/S037673880500596X
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Articulos(INCAPE)
Articulos de INST.DE INVEST.EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Citación
Yepes, D.; Cornaglia, Laura Maria; Irusta, S.; Lombardo, Eduardo Agustin; Different oxides used as diffusion barriers in composite hydrogen permeable membranes; Elsevier Science; Journal of Membrane Science; 274; 1-2; 4-2006; 92-101
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