氕和氘在Pd-8%Y合金膜中的渗透性能研究

Permeation Behavior of Protium and Deuterium through Tubular Pd-8%Y Alloy Membrane

研究了氕和氘在Pd-8%Y(原子分数,下同)合金膜中的渗透性能,预测了一定条件下以该合金管为分离膜材料的钯合金膜分离器对氕和氘的分离性能。结果表明:在573K～873K,0.05MPa～0.40MPa下,氕和氘的渗透通量与压力的平方根成正比,氕和氘的渗透率与温度之间满足阿伦尼乌斯公式;渗透通量与压力数据用J=ΦAmPn/tm拟合时,n在0.66左右,表明对于装置所用厚度的钯合金膜,表面过程对氕和氘的渗透率有很大影响;在该温度和压力范围内,如果忽略同位素之间的相互作用,钯合金膜分离器对1:1的氕和氘的分离系数在1.45～1.76之间,分离系数随温度的增高而减小。

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 requirment of Arrenius equation. When the data of the permation flux and pressure are fitted by J=ФAmlP^n/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 Hi and D2 with 1：1 （V/V） is between 1.45 and 1.76 if the interaction of Hi and D2 is neglected. The speration factor decreases with the increase of temperature.