Effect of composition on the density of multi-component molten nitrate salts.

Bradshaw, Robert W.

Sandia National Laboratories

关键词: Functions;    25 Energy Storage;    Sodium;    Nitrates;    Density;   

DOI  :  10.2172/983681
RP-ID  :  SAND2009-8221
RP-ID  :  AC04-94AL85000
RP-ID  :  983681

美国|英语

来源: UNT Digital Library

【 摘 要 】

The density of molten nitrate salts was measured to determine the effects of the constituents on the density of multi-component mixtures. The molten salts consisted of various proportions of the nitrates of potassium, sodium, lithium and calcium. Density measurements ere performed using an Archimedean method and the results were compared to data reported in the literature for the individual constituent salts or simple combinations, such as the binary Solar Salt mixture of NaNO3 and KNO3. The addition of calcium nitrate generally ncreased density, relative to potassium nitrate or sodium nitrate, while lithium nitrate decreased density. The temperature dependence of density is described by a linear equation regardless of composition. The molar volume, and thereby, density of multi-component mixtures an be calculated as a function of temperature using a linear additivity rule based on the properties of the individual constituents.