INCAPE   05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
artículos
Título:
NaA zeolite as an effective diffusion barrier in composite Pd/PSS membranes
Autor/es:
MARÍA L. BOSKO, FRANCO OJEDA, EDUARDO A. LOMBARDO, LAURA M. CORNAGLIA
Revista:
JOURNAL OF MEMBRANE SCIENCE
Editorial:
Elsevier
Referencias:
Año: 2009 vol. 331 p. 57 - 65
ISSN:
0376-7388
Resumen:
Palladium composite membranes on porous stainless steel were prepared by
electroless plating. In order to obtain a thin palladium film, an intermediate layer was
necessary to modify the pore size of the substrate and form a diffusion barrier between
the palladium film and the support. The NaA zeolite, used as intermediate, was
synthesized by vacuum-assisted secondary growth. Pure gas permeability tests were
conducted using hydrogen and nitrogen between 400 and 450ºC. The surface
morphology and the components of the different layers of the membrane were
characterized by scanning electron microscopy (SEM), energy-dispersive X-ray analysis
(EDS), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). When
vacuum was applied during the zeolite synthesis at 80°C, the Pd membrane showed
high H2/N2 ideal selectivity in the working temperature range. This result suggests that
NaA zeolite is an effective intermediate substrate modifier when an appropriate
synthesis method is employed2/N2 ideal selectivity in the working temperature range. This result suggests that
NaA zeolite is an effective intermediate substrate modifier when an appropriate
synthesis method is employed