TY - JOUR
T1 - The effect of co-existing gases from the process of steam reforming reaction on hydrogen permeability of palladium alloy membrane at high temperatures
AU - Unemoto, Atsushi
AU - Kaimai, Atsushi
AU - Sato, Kazuhisa
AU - Otake, Takanori
AU - Yashiro, Keiji
AU - Mizusaki, Junichiro
AU - Kawada, Tatsuya
AU - Tsuneki, Tatsuya
AU - Shirasaki, Yoshinori
AU - Yasuda, Isamu
N1 - Funding Information:
This study was financially supported by New Energy and Industrial Technology Development Organization (NEDO) through the “Development of highly efficient hydrogen production membranes”.
PY - 2007/9
Y1 - 2007/9
N2 - Hydrogen permeation measurements were carried out by using an Ag 23 wt%-Pd alloy membrane of 20 μ m thickness at temperatures from 773 to 873 K. Contrary to some reported results, hydrogen permeation flux was not affected by the co-existence of H2 O up to 9.5% at 873 and 773 K under non-pressurized conditions. Further addition of CO2 up to 27.9%, CH4 up to 6.8%, CO up to 4.6% did not reduce the permeation flux. Similarly, permeation flux was not affected in a pressurized system with H2 O up to 63%, 5% of CO with 30% of H2 O, 20% of CH4 with 15% of H2 O, under 0.29 MPa pressurization at 873 K. From the hydrogen partial pressure dependence of the permeation flux, the rate determining step was concluded to be the bulk diffusion of H in the membrane under the abovementioned conditions.
AB - Hydrogen permeation measurements were carried out by using an Ag 23 wt%-Pd alloy membrane of 20 μ m thickness at temperatures from 773 to 873 K. Contrary to some reported results, hydrogen permeation flux was not affected by the co-existence of H2 O up to 9.5% at 873 and 773 K under non-pressurized conditions. Further addition of CO2 up to 27.9%, CH4 up to 6.8%, CO up to 4.6% did not reduce the permeation flux. Similarly, permeation flux was not affected in a pressurized system with H2 O up to 63%, 5% of CO with 30% of H2 O, 20% of CH4 with 15% of H2 O, under 0.29 MPa pressurization at 873 K. From the hydrogen partial pressure dependence of the permeation flux, the rate determining step was concluded to be the bulk diffusion of H in the membrane under the abovementioned conditions.
KW - Co-existing gas
KW - High temperatures
KW - Hydrogen permeability
KW - Membrane reformer
KW - Palladium alloy membrane
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U2 - 10.1016/j.ijhydene.2007.03.037
DO - 10.1016/j.ijhydene.2007.03.037
M3 - Article
AN - SCOPUS:34548522776
VL - 32
SP - 2881
EP - 2887
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 14
ER -
