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Phase change materials in the ternary system NH4Cl + CaCl2 + H2O
Dong, Ouyang1; Zeng, Dewen1,2; Zhou, Hongyan1; Han, Haijun1; Yin, Xia2; Du, Yong3
2011-09-01
发表期刊CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
卷号35期号:3页码:269-275
文章类型Article
摘要Solubility isotherms of the ternary system (NH4Cl + CaCl2 + H2O) were elaborately determined at T = (273.15 and 298.15) K by using the isothermal method. In the equilibrium phase diagram, there are two solubility branches corresponding to the solid phases CaCl2 center dot 6H(2)O and NH4Cl. Invariant point compositions are 36.32 wt% CaCl2 and 3.4 wt% NH4Cl at 273.15 K, and 45.86 wt% CaCl2 and 5.22 wt% NH4Cl at 298.15 K. A Pitzer-Simonson-Clegg thermodynamic model was applied to represent the thermodynamic properties of this ternary system and to construct a partial phase diagram of the ternary system at temperatures between (273.15 and 323.15) K. It was found in the predicted solubility phase diagram that the double salt 2NH(4)Cl center dot CaCl2 center dot 3H(2)O, found by other authors at (323.1 and 348.1) K. will disappear at temperatures below 298.15 K. Besides, it was found that there are two peritectic points in the ternary system with peritectic temperatures at 299.65 K and 298.15 K, and the former peritectic point falls just on the line between the composition points of NH4Cl and CaCl2 center dot 6H(2)O. According to phase rule, a solution made of this point will begin to crystallize at 299.65 K and end at 298 K and therefore can be acted as a "pseudo eutectic" phase change material (PCM). A heat storing and releasing experiment of 50 grams of the PCM was carried out, obtaining a satisfying result. (C) 2011 Elsevier Ltd. All rights reserved.
关键词Phase Change Materials Pitzer-simonson-clegg Thermodynamic Model Ammonium Chloride Calcium Chloride
WOS标题词Science & Technology ; Physical Sciences
关键词[WOS]IONIC-SOLUTIONS ; THERMODYNAMICS ; MULTICOMPONENT ; ELECTROLYTES ; COEFFICIENTS ; EQUATIONS
收录类别SCI
语种英语
WOS研究方向Thermodynamics ; Chemistry
WOS类目Thermodynamics ; Chemistry, Physical
WOS记录号WOS:000294939900001
引用统计
被引频次:10[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/1868
专题青海盐湖研究所知识仓储
作者单位1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810007, Peoples R China
2.Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China
3.Cent S Univ, Sci Ctr Phase Diagrams & Mat Design & Manufacture, Changsha 410083, Peoples R China
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Dong, Ouyang,Zeng, Dewen,Zhou, Hongyan,et al. Phase change materials in the ternary system NH4Cl + CaCl2 + H2O[J]. CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY,2011,35(3):269-275.
APA Dong, Ouyang,Zeng, Dewen,Zhou, Hongyan,Han, Haijun,Yin, Xia,&Du, Yong.(2011).Phase change materials in the ternary system NH4Cl + CaCl2 + H2O.CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY,35(3),269-275.
MLA Dong, Ouyang,et al."Phase change materials in the ternary system NH4Cl + CaCl2 + H2O".CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY 35.3(2011):269-275.
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