|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Applications of Process Engineering Principles in Materials Processing, Energy and Environmental Technologies: An EPD Symposium in Honor of Professor Ramana G. Reddy
||N-5: High Temperature Properties of Molten Nitrate Salt for Solar Thermal Energy Storage Application
||Mehedi Bin Mohammad, Geoffrey Alan Brooks, Muhammad Akbar Rhamdhani, Muhamad Firdaus
|On-Site Speaker (Planned)
Molten alkali nitrates are used commercially as thermal storage fluids (HTF) for solar thermal electricity generation. Their range of operation is limited by the thermal stability and this limits the energy (steam-Rankine cycle) efficiency of these processes. In this study, the effect of atmosphere on the thermal stability of nitrates was studied using simultaneous thermal analysis techniques (STA). The use of Oxygen as a blanket gas was found to delay the decomposition point of the ternary NaNO3-KNO3-LiNO3 (13.23-57.14-29.63 weight ratio) mixture by 55°C. By which operating range will increase 65°C more compared to the binary solar salt. Higher heating rates increased the decomposition point but has less effect on premelting and melting properties. NO, and O2 evolution after melting indicates concurrent reversible reactions. Similar phenomena were observed for single and binary nitrates. The eutectic melting point of ternary nitrate obtained from the STA agreed well with FactSage eutectic composition prediction.
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