KCl-MgCl_2-LiCl及CaCl_2-MgCl_2-NaCl熔盐系中MgCl_2活度的简化亚正规模型

Modeling of Activity of MgCl_2 in the KCl-MgCl_2-LiCl and CaCl_2-MgCl_2-NaCl Molten Salt Systems

建立了一个描述KCl－MgCl2－LiCl及CaCl2－MgCl2－NaCl熔盐体系中MgCl2活度的溶液模型．模型假定将所讨论体系中的盐处理成独立的粒子而不是它们的离子形式，并对上述熔盐组元对之间的相互作用进行了分析，用随MgCl2成份变化的相互作用能可以较好地描述MgCl2的活度．与前人结果比较，本模型所用参数少且物理意义较明确．

The activity of MgCl2 in both KCl-MgCl2-LiCl and CaCl2-MgCl2-NaCl moltensalt systems were calculated based on a simplified subregular solution model. Firstly theelectrolytes are treated as independent particles instead of ionic forms and the interchangeenergy between KCl and LiCl (or CaCl2 and NaCl ) pairs is ignored as compared to those ofKCl and MgCl2 (or CaCl2 and MgCl2) and MgCl2-LiCl (or MgCl2 and NaCl) pairs. Secondly,the interchange energy between KCl and MgCl2 (or CaCl2 and MgCl2) is considered to be afunction of the composition of discussed systems. The calculated results by the model agreewith the experimelital data very well.