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Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Sci+Rep 2018 ; 8 (ä): ä Nephropedia Template TP
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Stabilization of molten salt materials using metal chlorides for solar thermal storage #MMPMID29844342
Dunlop TO; Jarvis DJ; Voice WE; Sullivan JH
Sci Rep 2018[]; 8 (ä): ä PMID29844342show ga
The effect of a variety of metal-chlorides additions on the melting behavior and thermal stability of commercially available salts was investigated. Ternary salts comprised of KNO3, NaNO2, and NaNO3 were produced with additions of a variety of chlorides (KCl, LiCl, CaCl2, ZnCl2, NaCl and MgCl2). Thermogravimetric analysis and weight loss experiments showed that the quaternary salt containing a 5?wt% addition of LiCl and KCl led to an increase in short term thermal stability compared to the ternary control salts. These additions allowed the salts to remain stable up to a temperature of 630?°C. Long term weight loss experiments showed an upper stability increase of 50?°C. A 5?wt% LiCl addition resulted in a weight loss of only 25% after 30?hours in comparison to a 61% loss for control ternary salts. Calorimetry showed that LiCl additions allow partial melting at 80?°C, in comparison to the 142?°C of ternary salts. This drop in melting point, combined with increased stability, provided a molten working range increase of almost 100?°C in total, in comparison to the control ternary salts. XRD analysis showed the oxidation effect of decomposing salts and the additional phase created with LiCl additions to allow melting point changes to occur.