Diffusion bonding of pd-ag rolled membranes

Pd-based membrane reactors for producing ultra pure hydrogen: Oxidative reforming of bio-ethanol

“…A thin wall permeator tube of diameter 10 mm, wall thickness 60 mm and length 140 mm has been produced at ENEA laboratories via cold-rolling and diffusion welding of PdeAg foils [25,26]. Such a thin wall tube can operate with a maximum i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 3 8 ( 2 0 1 3 ) 7 0 1 e7 0 7 lumen pressure of 250 kPa.…”

Validation of a dynamic model of hydrogen permeation through Pd-based membranes

“…Then, the permeator tubes were obtained by joining the limbs of the metal foil via diffusion welding (Tosti and Bettinali, 2004;Tosti et al, 2001).…”

“…Greek letters ı membrane thickness (m) ı ps porous support thickness (m) ε porosity of the porous medium gas viscosity (Pa s) Â surface coverage (fraction of hydrogen atoms to Pd atoms (H/Pd ratio) on surface) (Tosti and Bettinali, 2004;Tosti et al, 2001): their characterization in terms of hydrogen permeability (Tosti et al, 2003 and reforming reaction tests Tosti et al, 2008aTosti et al, ,b, 2010 has been widely studied. Particularly, the dynamic simulation of the multi-component transport phenomena both through the metallic layer and along the flow direction has been performed.…”

CO‐Free Hydrogen Production by Ethanol Steam Reforming in a Pd–Ag Membrane Reactor

“…Figure 1 represents the MR consisting of a tubular stainless steel module, length 280 mm, id 20 mm and containing a pine-hole free Pd-Ag membrane having wall thickness of 50 lm, od 10 mm, length 150 mm. The dense Pd-Ag membrane, produced by a cold-rolling and diffusion welding technique [17,18], has the upper temperature limit around 450°C and it is permeable only to hydrogen.…”