Permeation behavior of protium and deuterium through tubular Pd-8%Y alloy membrane

The permeations of protium and deuterium through a tubular Pd-8%Y membrane were investigated in the temperature range from 573 K to 873 K and in pressure range from 0.05 MPa to 0.40 MPa. under the above mentioned temperature and pressure conditions, the permeation fluxes of protium and deuterium are in proportion to the square root of the pressure, the relationship between the protium and deuterium permeation and temperature meets the requirement of Arrenius equation. When the data of the permation flux and pressure are fitted by J = ΦAmPn/tm, n is about 0.66, it means that the surface process has great influence upon the permeations of protium and deuterium. The separation factors of H1 and D2 with 1:1 (V/V) is between 1.45 and 1.76 if the interaction of H1 and D2 is neglected. The separation factor decreases with the increase of temperature.