Thanks to their high hydrogen permeability, vanadium based alloys can be a valuable and sustainable alternative to palladium alloys, commonly employed in commercial membranes for hydrogen purification/separation. In this work, the unprecedented deposition of micrometric vanadium-based multilayers and their investigation as hydrogen selective membranes have been reported. In particular, this work describes the use of High Power Impulse Magnetron Sputtering, a technique easily scalable also for complex geometries, for the deposition of dense and crystalline Pd/V93Pd7/Pd multilayers with total thickness <7 mm onto porous alumina. These membranes showed high hydrogen fluxes in the 300e400 C range, up to 0.26 mol m2 s1 at 300 kPa pressure difference and 375 C, as well as an unexpected and significant resistance to hydrogen embrittlement and to syngas in operating conditions.

Hydrogen separation by thin vanadium-based multi-layered membranes

Ferrario, Alberto;Romano, Matteo;Armelao, Lidia
2018

Abstract

Thanks to their high hydrogen permeability, vanadium based alloys can be a valuable and sustainable alternative to palladium alloys, commonly employed in commercial membranes for hydrogen purification/separation. In this work, the unprecedented deposition of micrometric vanadium-based multilayers and their investigation as hydrogen selective membranes have been reported. In particular, this work describes the use of High Power Impulse Magnetron Sputtering, a technique easily scalable also for complex geometries, for the deposition of dense and crystalline Pd/V93Pd7/Pd multilayers with total thickness <7 mm onto porous alumina. These membranes showed high hydrogen fluxes in the 300e400 C range, up to 0.26 mol m2 s1 at 300 kPa pressure difference and 375 C, as well as an unexpected and significant resistance to hydrogen embrittlement and to syngas in operating conditions.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3270174
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