Pd-Ag膜电解浓缩氚的动力学模型及理论计算

建立了模拟Pd-Ag合金膜电解浓缩氚的过程和诸多电解参数的动力学模型。采用求解数学扩散方程的方法得到理论值，并与文献报道的实验数据进行比较。计算结果表明：氚在Pd-Ag膜上的吸附、解吸、浓缩等行为受到诸多条件的制约。在保证密封性能的前提下，对Pd-Ag膜电解槽体的要求是至少应包括有含氚水路循环、阳极气体消除和阴极扩散后氚再生3个组成部分，采取相匹配的级联技术可以提高分离效果；对电解参数的要求是采取尽可能高的电解液温度和稳定的OH^-浓度，合适的电流密度，合理的膜厚度、表面特征和Pd黑结合紧密。

Dynamics model and theoretical calculation of tritium enrichment by Pd-Ag membrane electrolysis

A dynamics model is established to simulate the tritium enrichment process and to optimize the electrolysis parameters in the Pd-Ag alloy membrane electrolytic cells, and then the theoretical calculation is performed and compared with the experimental results. The analysis shows that the behavior of tritium absorption, desorption and enrichment depends on many conditions, besides a fine seal property, the Pd-Ag membrane electrolytic cell consists of at least three sub-systems: the tritium water circuit, the anode gas eliminating facility and the cathode tritium recovery facility. In addition, a cascade design could improve the separation performance of the device. It is found that higher electrolysis temperature, stable OH- concentration, suitable current, reasonable thickness and metallographic structure and strictly-deposited palladium black for membrane, are demanded.