联合电解催化交换系统HD／H2O和HT／H2O体系模拟

Simulation of Combined Electrolysis Catalytic Exchange With HD/H2O and HT/H2O Systems

计入蒸汽的影响，研究建立基于两步传质的联合电解催化交换系统模型，计算HD／H2O和HT／H2O两个体系的分离性能。传质系数的提高能显著改善交换系统的整体性能，电解池浓缩倍数与电解池滞液量有关。电解池中氘浓度的增长最终将引起交换系统脱氘率的下降，这一现象表明，在交换系统操作模式选择以及与后级浓缩系统的级联匹配中，对交换系统的动态行为必须予以特别关注，并应在交换床设计中考虑此因素。

Based on two-step isotope exchange process, a theoretical model incorparating vapour effect for combined electrolysis catalytic exchange （CECE） system was constituted. The separation performance of HD/H2O and HT/H2O systems was calculated by using this model. The increase of mass transfer coefficient can notebly improve exchange system＇s performance. The deuterium enrichment in electrolysis cell will finally cause a poor deuterium-extraction efficiency, and this conflict indicates that dynamic behavior of CECE is a main concern in the choice of operating mode and the connection with cascade post-enrichment sysytem, and it should be an important factor in designning catalytic exchange column.