Synthesis of CaCl2.6H2O by Using Phase Diagram and Verification of its Ability to Remain as a Hexahydrate at Various Thermal Effects

Authors

  • Venkata Subbarayudu Sistla Rajiv Gandhi Institute of Petroleum Technology, Raebareli
  • A Sharma

Keywords:

Crystallization, Phase diagram, Hydrate synthesis, PCM, Energy storage

Abstract

Antarcticite (CaCl2.6H2O) is one of the salt hydrate forms of Calcium chloride. It has a specific application in energy storage systems at ambient temperature, since its melting point is around 29ºC. During the conventional synthesis of Antarcticite, a risk of other hydrates crystallization is there. An experimental procedure is designed through binary melting phase diagram for selective crystallization of Antarcticite from aqueous CaCl2 solution. The melting and recrystallization behavior of Antarcticite under various heating and cooling rates tested at milligram scale and possibility of other hydrates crystallization is verified. During heat effect tests (heating and cooling cycles at various rates), change in melting point of CaCl2.6H2O and the loss in the melting enthalpy observed due to the formation of CaCl2.4H2O. The material after heat effect tests found to be useful as a phase change material in energy storage applications, where daily ambient is recorded at a minimum temperature ≤ 25°C and a maximum temperature ≥ 40°C.

 

Keywords: PCM, crystallization, phase diagram, hydrate synthesis, energy storage

 

Cite this Article

 

Sistla VS, Sharma A. Synthesis of CaCl2.6H2O by using Phase Diagram and verification of its ability to remain as a Hexahydrate at various thermal effects. Journal of Alternate Energy Sources and Technologies. 2015; 6(3):60–71p.

 


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Published

2015-11-05

Issue

Vol. 6 No. 3 (2015)

Section

Research Article

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