Thermodynamic evaluation and optimization of the (NaNO3 + KNO3 + Na2SO4 + K2SO4) system |
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| Affiliation: | 1. Center for Thorium Molten Salts Reactor System, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;3. University of South China, Hengyang 421001, PR China;1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China;2. Center for Research in Computational Thermochemistry (CRCT), Dept. of Chemical Engineering, Ecole Polytechnique, Montréal, Québec, H3C 3A7, Canada;3. Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China;4. Shanghai Key Laboratory of Modern Metallurgy &Materials Processing, Shanghai University, Shanghai, 200072, China |
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| Abstract: | A complete critical evaluation of all available phase diagram and thermodynamic data has been performed for all condensed phases of the (NaNO3 + KNO3 + Na2SO4 + K2SO4) ternary reciprocal system, and optimised model parameters have been found. The model parameters obtained for the four binary common-ion subsystems (i.e. (NaNO3 + Na2SO4), (KNO3 + K2SO4), (NaNO3 + KNO3) and (Na2SO4 + K2SO4)) are used to predict thermodynamic properties and phase equilibria for the entire system. The Modified Quasichemical Model in the Quadruplet Approximation for short-range ordering was used for the molten salt phase, and the Compound Energy Formalism was used for the various solid solutions. |
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| Keywords: | Molten nitrates Molten sulphates Reciprocal system Thermodynamic modelling |
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