Pd8.5Y0.19Ru合金膜的氕氘渗透特性

Hydrogen Permeability of Pd8.5Y0.19Ru Alloy Membrane

摘要:

研究了厚度40 μm的Pd8.5Y0.19Ru（原子分数）合金膜的氢渗透性能。结果表明，在573~723 K温度范围内，氢在膜中的渗透符合Fick第一定律，氕、氘的渗透率表达式分别为ΦH＝2.566×10-6exp(–3542.45/T) mol/m·s·Pa0.5和ΦD＝1.398×10-6exp(–3443.72/T) mol/m·s·Pa0.5，与钯钇合金相比，合金元素钌的加入降低了氕氘的渗透率和渗透分离系数。另外，CH4对膜还具有较强的毒化作用。

关键词:d8.5Y0.19Ru合金膜;氢同位素;渗透;分离系数

Abstract:

Protium and deuterium permeation measurements were carried out with Pd8.5Y0.19Ru alloy membrane of 40 μm in thickness between 573 K-723 K. Fick's 1st pervasion law can be used to describe the hydrogen permeation behavior. The protium and deuterium permeability of the membrane and separation factors for the H-D gas mixture were obtained. The permeability expression of protium and deuterium are ΦH＝2.566×10-6exp(-3542.45/T) mol/m·s·Pa0.5 and ΦD＝1.398×10-6exp(-3443.72/T) mol/m·s·Pa0.5, respectively. Compared with Pd-Y binary alloy membrane, Ru element addition decreases the membrane’s permeability and the separation factors. Besides, CH4 has strong poison effect to the membrane.

Key words:Pd8.5Y0.19Ru alloy membrane; hydrogen isotope; permeation; separation factor