双柱周期逆流法分离氢同位素

将具有正、反氢同位素效应的2种贮氢材料Pd和LaNi_4.7Al_0.3结合，组成双分离柱，测试了原料气氘原子摩尔分数为0.5和0.1的2种混合气体的流出曲线，并进行了周期逆流方式的分离实验。实验结果表明，该分离方法具有较高的分离效率，产品气的氘原子摩尔分数一般大于0.995。改进方式后分离氘原子摩尔分数为0.1的原料气，产品气的最大氘原子摩尔分数为0.998，最大氘富集比为9.98，氘的回收率为92.5%，尾气中氢原子摩尔分数大于0.996，全分离因子大于120 000。

Hydrogen Isotopes Separation Using Twin Combined Columns Packed With Pd and LaNi4.7Al0.3

A series of hydrogen isotope separation experiment by the twin-bed periodically counter-current flow were carried out using twin combined columns separately packed with Pd and LaNi4.7Al0.3,which shows inverse isotope effect.Two kinds of feed gases,the deuterium atomic molar fraction 0.5 and 0.1,were supplied during the effluent curve test and hydrogen isotope separation experiment.The results show that this hydrogen isotope separation by periodically counter-current flow has a quite high separate efficiency.Deuterium atom mole fraction in the product is normally greater than 0.995.For the separation of feed gas that deuterium atomic mole fraction was 0.1 by our improved operation manner,the maximum deuterium atomic mole fraction in product,the maximum enrichment,the deuterium recovery ratio are 0.998,9.98 and 92.5% respectively,hydrogen atomic mole fraction in exhaust is greater than 0.996,and the full separation coefficient is over 120 000.