Journal article
Hydrogen permeation in asymmetric La28-xW4 + xO54 + 3x/2 membranes
Asymmetric supported La28 - xW4 + xO 54 + 3x/2 (La/W ≈ 5.6) membranes were investigated for their hydrogen permeation properties as a function of temperature and feed gas conditions. Dense membranes of thickness 25-30 μm supported on substrates with 25 and 40 vol.% porosity were compared. Above 850 °C under dry conditions, the hydrogen permeation rate was approximately constant as a function of temperature due to low concentration of protons in the material at high temperatures.
Under humid conditions and above 960 °C enhanced permeation rates were observed. A hydrogen permeation as high as 0.14 NmL min-1 cm-2 was recorded at 1000 °C with 10 vol.% H2 (2.5 vol.% H2O) as feed gas.
Language: | English |
---|---|
Year: | 2013 |
Pages: | 3087-3091 |
ISSN: | 18793487 and 03603199 |
Types: | Journal article |
DOI: | 10.1016/j.ijhydene.2012.12.105 |
ORCIDs: | Gil, Vanesa |