Hydrogen permeation in asymmetric La28-xW4 + xO54 + 3x/2 membranes

Vanesa Gil; Jonas Gurauskis; Christian Kjølseth; Kjell Wiik; Mari-Ann Einarsrud

doi:10.1016/j.ijhydene.2012.12.105

Hydrogen permeation in asymmetric La_28-xW_{4 + x}O_{54 + 3x/2} membranes

Vanesa Gil, Jonas Gurauskis, Christian Kjølseth, Kjell Wiik, Mari-Ann Einarsrud

Department of Energy Conversion and Storage

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

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.

Original language	English
Journal	International Journal of Hydrogen Energy
Volume	38
Issue number	7
Pages (from-to)	3087-3091
ISSN	0360-3199
DOIs	https://doi.org/10.1016/j.ijhydene.2012.12.105
Publication status	Published - 2013

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title = "Hydrogen permeation in asymmetric La28-xW4 + xO54 + 3x/2 membranes",

abstract = "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.",

author = "Vanesa Gil and Jonas Gurauskis and Christian Kj{\o}lseth and Kjell Wiik and Mari-Ann Einarsrud",

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T1 - Hydrogen permeation in asymmetric La28-xW4 + xO54 + 3x/2 membranes

AU - Gil, Vanesa

AU - Gurauskis, Jonas

AU - Kjølseth, Christian

AU - Wiik, Kjell

AU - Einarsrud, Mari-Ann

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

U2 - 10.1016/j.ijhydene.2012.12.105

DO - 10.1016/j.ijhydene.2012.12.105

M3 - Journal article

SN - 0360-3199

VL - 38

SP - 3087

EP - 3091

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 7