多钯柱热置换色谱法分离氢同位素

Hydrogen Isotopes Separation by Palladium Thermal Displacement Chromatographic Method

采用多钯柱热置换色谱法建立了一套氢同位素分离的实验装置,研究了钯柱活化时间、原料气的组成及高丰气体的提取比例对分离效果的影响。结果表明,钯柱在500～550℃活化3h,分离温度选定250℃,升温速率10℃/min,在适中的提取比例下,高丰气体可获得最佳的分离效果,该系统能快速地将产品气中氕的体积分数降到1.0%以下。

An experimental apparatus for separation of hydrogen isotopes was developed by using multi-bed palladium displacement chromatography. The effects of vacuum treatment time of palladium column, extraction proportion and the composition of original gas on sepa- ration efficiency were also studied. The results indicate that with more than three hours vacuum treatment for the separation column at 500-550 ℃ and keeping the temperature rise rate at 10 ℃/min, high pure deuterium or tritium can be obtained. As for a mixture of protium and deuterium gas, less than 1.0%（volume fraction） protium can be obtained under appro- priate proportional extraction.