Abstract
Palladium acetate was sublimed at a reduced pressure at 400°C., carried into the macropores of the porous wall of an α-alumina support tube and was decomposed there. A thin palladium membrane which was thus formed showed a hydrogen permeance of 106 mol·m2·s1.-Pa1 and a hydrogen/nitrogen permselectivity higher than 1000. The membrane was stable against hydrogen embrittlement even when the permeation temperature was varied between 100 and 300°C., and it was stable to sulfur or chlorine. To test the ability of this system for the separation of hydrogen and deuterium, a palladium disk was used instead of the prepared membrane since a definite membrane thickness was necessary for calculation. When H2 and D2 permeated through the membrane independently, the H/D permselectivity was approximately 7 at 150–200°C under a feed side pressure of 0.4 MPa and a permeate side pressure of 0.1 MPa. When a mixture of H2 and D2 was fed, the H/D permselectivity was reduced to 1.2–1.6.
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Aoki, K., Yokoyama, S., Kusakabe, K. et al. Preparation of supported palladium membrane and separation of hydrogen. Korean J. Chem. Eng. 13, 530–537 (1996). https://doi.org/10.1007/BF02706005
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DOI: https://doi.org/10.1007/BF02706005