Membrane seals, copper gaskets

Fig. 8.9 Hydrogen flux data from a 100 xm thick unalloyed ptdladium foiL Sieverts Law is followed very well, and the square root dependence implies that hydrogen is transported through the membrane in a dissociated form. The membrane, sealed by copper gaskets, was essentially 100% selective towards hydrogen with no leak to helium detected. Permeability at 440°C was 1.9 x 10 mol m- s-> Pa- -5...

Fig. 8.10 Hydrogen flux data of a composite membrane incorporating a Group IVB-VB material. Sieverts Law is followed very weU and a permeability at 440°C of 2.3 10 mol m s Pa was achieved. The membrane, sealed with copper gaskets, was essentially 100% selective towards hydrogen showing no detectable leak to helium. The disk withstood 33 bar differential pressure (Copyright Wiley-VCH Verlag, GmbH Co. KGaA, 2006. Adapted with permission from [8], Nonporous Inorganic Membranes.)...

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