Phase Diagram Prediction of the System Mg(NO3)2-MgCl2-H2O as Phase Change Materials

被引：0

作者：

Zhou Quanbao ^{[1
]}

Yin Xia ^{[1
]}

Wang Qiong ^{[1
]}

Wang Cheng ^{[1
]}

机构：

[1] Hunan Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China

来源：

ACTA CHIMICA SINICA | 2011年 / 69卷 / 15期

关键词：

BET model; solubility; Mg(NO3)(2); MgCl2; phase change material; MODIFIED BET EQUATION; PLUS WATER-SYSTEM; VAPOR-PRESSURE; THERMODYNAMIC CONSISTENCY; CONCENTRATED-SOLUTIONS; SALT; SOLUBILITY; MGCL2; ELECTROLYTE; EQUILIBRIA;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The modified BET thermodynamic model was applied to predict phase diagram of the system Mg(NO3)(2)-MgCl2-H2O from 273 to 373 K, in which two eutectic points were found. The exothermal and endothermal behavior of the predicted eutectic points were measured and the results showed that the ternary eutectic point Mg(NO3)(2)center dot 6H(2)O(45.6%)-Mg(NO3)(2)center dot 2H(2)O(29.6%)-MgCl2 center dot 6H(2)O(24.8%) has poor energy-storage ability, while another binary eutectic point Mg(NO3)(2)center dot 6H(2)O(61.6%)-MgCl2 center dot 6H(2)O(38.4%) has good exothermal and endothermal ability near the melting temperature with melting heat 136.8 J.g(-1) determined by differential thermal analysis (DTA), and is expected to be used for the potential phase change material.

引用

页码：1725 / 1730

页数：6

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