The preparation and properties of multi-component molten salts
Jianping Yang and
Applied Energy, 2010, vol. 87, issue 9, 2812-2817
This paper was focused on thermal stability of molten salts and their thermo-physical properties at high temperature. In this experiment, multi-component molten salts composed of potassium nitrate, sodium nitrite and sodium nitrate with 5% additive A of the chlorides were prepared by statical mixing method. The experiments found molten salt with 5% additive A had higher thermal stability and its best operating temperature would be increased to 550Â Â°C from 500Â Â°C when comparing to ternary nitrate salt. Meanwhile, thermal stability and thermal cycling analysis showed molten salts with 5% additive A had lower freezing point and loss of nitrite content and deterioration time of molten salts were reduced at the same time. DSC tests also indicated loss of latent heat in molten salts with 5% additive A was decreased. Besides, thermo-physical properties measured showed molten salt with 5% additive A had a heat capacity of 2.32Â kJ/kgÂ Â°C, lower than 4.19Â kJ/kgÂ Â°C for water between 0Â Â°C and 100Â Â°C and a low viscosity range from 3.0 to 1.4Â cp between 150Â Â°C and 500Â Â°C, analogous with 1.8-0.3Â cp for water between 0Â Â°C and 100Â Â°C. Other thermo-physical properties, such as thermal conductivity, density and linear thermal expansion, were also determined here.
Keywords: Molten; nitrate; salt; Additive; Thermal; stability; Thermo-physical; properties (search for similar items in EconPapers)
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