储能科学与技术2025，Vol.14Issue(6)：2515-2523,9.DOI:10.19799/j.cnki.2095-4239.2024.1227
硝基锂钠钾二元及三元盐的相图分析
Phase diagram analysis of binary and ternary salts of lithium,sodium and potassium nitroxides
张金柱 1孟令然 1吴玉庭 1石天庆 1商永强 1智瑞平 1魏雯珍1
作者信息
- 1. 华电郑州机械设计研究院有限公司,河南 郑州 450046
- 折叠
摘要
Abstract
The eutectic properties of molten salts are key indicators for assessing their potential in thermal storage applications,with broad relevance in efficient thermal storage technologies.To quickly and accurately predict whether a eutectic can form between different components of mixed nitrate salts,and to further determine their eutectic composition and lowest melting point,this study employs FactSage thermodynamic simulation software to simulate five common nitrate salts—lithium nitrate(LiNO3),potassium nitrate(KNO3),sodium nitrate(NaNO3),potassium nitrite(KNO2),and sodium nitrite(NaNO2).Phase diagrams of their binary and ternary systems were predicted thermodynamically.Based on the simulation results,the effects of anions and cations on the eutectic properties of binary and ternary nitro salt systems were further analyzed.It was found that different combinations of anions and cations significantly influence the eutectic formation temperature and eutectic composition.To verify the accuracy of the phase diagram predictions,binary salt(Li-K nitrate)and ternary salt(Li-Na-K nitrate)systems with favorable eutectic behavior were experimentally validated by determining their melting points and eutectic compositions.The experimental results showed consistency with the predicted values,further confirming the validity and accuracy of FactSage software in predicting the phase diagrams of molten salt systems.In addition,this study predicts binary and ternary phase diagrams for several common nitro salts to analyze the mechanism by which cations and anions influence mixed molten salt energy storage media.Through this work,new approaches are proposed for evaluating the eutectic behavior of mixed nitrate salts,providing essential theoretical support for optimizing and applying molten salts in future thermal storage technologies.关键词
熔盐/相图计算/共晶/熔点Key words
molten salt/phase diagram calculation/eutectic/melting point分类
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张金柱,孟令然,吴玉庭,石天庆,商永强,智瑞平,魏雯珍..硝基锂钠钾二元及三元盐的相图分析[J].储能科学与技术,2025,14(6):2515-2523,9.
