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- W2260607788 abstract "The thermodynamic and transport properties of molten carbonates and their mixtures are needed for the application in fuel cell technology. Although considerable measurements of these properties such as surface tension, molar volume and electrical conductivity at high temperature have been made in the past, the existent data is still limited due to experimental difficulties and only available for pure alkali carbonates and their mixtures of specific compositions. Therefore, it becomes important to develop a model capable of estimating these properties as a function of composition. The molecular theory of corresponding states is based on the mathematical properties of the intermolecular potential energy function. It gives us a basis for computing and correlating the thermodynamic properties of a substance once the potential energy function of that substance is known. In molten salts, the pair potential incorporates the long-range Coulomb potential, short-range repulsive energy and the weak long-range terms, such as dipole, induction and dispersion energy. It is assumed that the configuration of the ions is determined by the Coulomb potential and that the weak long-range potential is much weaker than the Coulomb term [1,2]. Consequently, the pair potential may be simplified to a modified Coulomb and hard-core potentials with the characteristic length and the characteristic potential. One of the advantages of the molecular theory of corresponding states is that it can be meaningfully extended to mixtures by mixing rules for pair potential parameters. Therefore, surface tension of molten carbonate mixtures can be estimated based on the properties of pure component according to this approach. Table 1 compares the estimated surface tension of ternary Li/Na/K carbonate mixtures with experimental data obtained by Kojima et al [3]. It shows the values of surface tension estimated from the approach using in this work are closer to experimental data than those obtained from the Guggenheim rule. The deviation for these compositions is within 1.5%." @default.
- W2260607788 created "2016-06-24" @default.
- W2260607788 date "2009-01-01" @default.
- W2260607788 modified "2023-09-26" @default.
- W2260607788 title "Estimation of Surface Tension of Molten Carbonate Mixtures by the Theory of Corresponding States" @default.
- W2260607788 doi "https://doi.org/10.1149/ma2009-02/6/362" @default.
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