A theoretical model was built to study the separation of hydrogen isotopes by the electrolysis-distillation process,and the separation performance of H2/HD/HT was investigated.Enrichment behavior of both electrolysis and distillation was obtained: HDO and HTO concentration in electrolysis reached 8.35×10-4 and 6.34×10-6 respectively;HD and HT concentration in reboiler finally reached 0.033 and 6.06×10-5 respectively.For the difference of separation factor for H/D and H/T,about 63.4% HTO stay in electrolysis cell which brought a poorer HT enrichment in reboiler compared with that of HD.As enrichment developed,deuterium(tritium) extraction efficiency decreased with time.
利用建立起来的理论模型,深入研究了联合电解催化交换(Combined Electrolysis and Catalytic Exchange,CECE)工艺中各种因素对氢同位素分离性能的影响。电解池分离因子的提高对浓缩倍数和脱氚率均有显著影响,降低电解池滞留量是提高浓缩倍数的有效手段。进料位置在1.5m处系统性能好于3m处;催化剂传质系数在3～4mol·m-3·s-1范围内,浓缩倍数和脱氚率基本呈线性增长。各种因素对HD/H2O和HT/H2O两个体系的影响具有相似的规律性,由于热力学因素的差异,相同条件下,HT/H2O体系分离性能好于HD/H2O。
