Effects of High Concentration CO and CO<SUB>2</SUB> on Hydrogen Permeation through the Palladium Membrane

Surface effects and CO/CO2 influence in the H2 permeation through a Pd–Ag membrane: A comprehensive model

“…4 and 5 show that, in agreement with the literature [21,26], the inhibition effect of CO/CO2 decreases with temperature. Moreover, it is observed that for CO there is a high gap between the normalized hydrogen fluxes at 673 and 573 K as compared with other temperatures.…”

The effects of gas mixtures on hydrogen permeation through Pd–Ag/V–Ni alloy composite membrane

“…Amano et al reported that a slight deterioration of the hydrogen permeability through palladium membrane (700 mm thick) was observed in the case of using a H 2 -50% CO 2 gas below 473 K [15], and Hou et al observed a slight influence of CO 2 (1e8%) at 548 K while no influence of CO 2 on hydrogen permeation through Pd/Ag membrane (5 mm thick) was found at 598 K [23]. Unlike previous reports by other research groups [15,23], a strong influence of CO 2 on hydrogen permeability was shown using thin 100 nm Pd/Ag membranes at temperature conditions between 473 and 673 K. According to the literature, CO impurity has a negligible influence on hydrogen permeation [17,18,20,23] when using thick membranes. Hou et al concluded that the influence of impurity adsorption on hydrogen permeation for a thinner membrane will be stronger than that for a thicker membrane under the same operating conditions, as it is evident that for a thinner membrane, a higher operating temperature is required to completely eliminate the influence of impurity adsorption on hydrogen permeation [23].…”

“…Amano et al [15] found that the addition of CO and CO 2 to hydrogen caused deterioration in hydrogen permeation through a Pd membrane below 523 K and 473 K, respectively. McBride and McKinley [16], Loegsgaard Jorgensen et al [17] and Hara et al [18] also observed a CO retardation effect on hydrogen permeation through Pd-based membranes at temperatures below 573 K and a study by Li et al [19] showed similar effects up to 653 K. Amandusson [20] reported that CO had no influence on hydrogen permeation at temperatures of 623 K and above.…”

Hydrogen permeation characteristics of melt-spun Zr60Al15Co2.5Ni7.5Cu15 glassy alloy membrane

“…In particular, amorphization of hydrogen storage alloy is believed as an effective method to suppress the hydrogen-induced pulverization (embrittlement) and to improve the cycle stability of the alloy during hydrogenation and dehydrogenation [17,18]. Therefore, a number of researchers are interested in the possibility of amorphous alloys as hydrogen separative membrane [19][20][21][22][23]. However, little is known about the data on the hydrogen permeation characteristics of glassy-type alloys.…”