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- W2000712448 abstract "Dense ceramics with mixed protonic–electronic conductivity are of considerable interest for the separation and purification of hydrogen and as electrochemical reactors. In this work, the hydrogen permeability of a Sr 0.97 Ce 0.9 Yb 0.1 O 3 − δ (SCYb) membrane with a porous Pt catalytic layer on the hydrogen feed-exposed side has been studied over the temperature range 500–804 °C employing Ar as the permeate sweep gas. A SiO 2 –B 2 O 3 –BaO–MgO–ZnO-based glass-ceramic sealant was successfully employed to seal the membrane to the dual-chamber reactor. After 14 h of exposure to 10% H 2 :90% N 2 at 804 °C, the H 2 flux reached a maximum of 33 nmol cm − 2 s − 1 , over an order of magnitude higher than that obtained on membranes of similar thickness without surface modification. The permeation rate then decreased slowly and moderately on annealing at 804 °C over a further 130 h. Thereafter, the flux was both reproducible and stable on thermal cycling in the range 600–804 °C. The results indicate an important role of superficial activation processes in the flux rate and suggest that hydrogen fluxes can be further optimised in cerate-based perovskites." @default.
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- W2000712448 date "2010-02-24" @default.
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- W2000712448 title "Hydrogen-permeation characteristics of a SrCeO3-based ceramic separation membrane: Thermal, ageing and surface-modification effects" @default.
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- W2000712448 doi "https://doi.org/10.1016/j.ssi.2009.03.014" @default.
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