Abstract
A new multicomponent solid—liquid phase equilibrium calculation algorithm is described. The algorithm has the following features: (1) the phase selection procedure is easy (no stability test is needed); (2) the Gibbs phase rule is guaranteed; and (3) the mathematical procedures have thermodynamic meanings. Numerical examples for NaClKClMgCl 2CaCl 2H 2O quinary system and its quaternary subsystems illustrate the capability of this algorithm. The comparison between this algorithm and the SQP (sequential quadratic programming) method for NaClKClMgCl 2H 2O system at 298.15 K and 273.15 K demonstrates the advantage of the new algorithm ovre SQP method.
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