International Journal of Hydrogen Energy, Vol.42, No.21, 14583-14592, 2017
Porous stainless steel support for hydrogen separation Pd membrane; fabrication by metal injection molding and simple surface modification
We prepared a disc-shaped porous stainless steel (PSS) support for hydrogen separation Pd membrane via metal injection molding (MIM) method to facilitate the mass production of porous substrates. MIMed PSS supports obtained in a batch showed relatively higher apparent porosity (from 32.75% to 39.28%) than that reported for commercially available PSS substrate. In addition, the surface morphologies of the MIMed PSS, surface roughness of 1.119 mu m and pore depth of 8.6 mu m, indicate its suitability as a membrane support than the commercially available one. Pd membrane prepared over MIMed PSS, which was modified by a simple axial pressing method to control the surface morphologies, had a thinner Pd layer, 2.94 mu m, and showed an extremely higher ideal H-2/N-2 selectivity with a hydrogen permeation flux of 21.3 mVmin/cm(2) at del-P = 1 bar and 400 degrees C, compared with Pd membrane over MIMed PSS modified with conventional surface modification. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.