Thermodynamic analysis of solid-solid and solid-liquid equilibria in binary systems composed of n-alkanes: Application to the system tricosane (C23H48) plus pentacosane (C25H52)

This paper presents the elements needed to carry out thermodynamic assessme nts of phase equilibria in binary systems of normal alkanes in the range fr om hexadecane (C16H34) to octacosane (C28H58) and so for the transition fro m the ordered mixed solid state to the mixed rotator state: the methodology of the computations and the transition properties of the pure component su bstances as a function of chain length. The proposed approach is applied to the system tricosane (C23H48) + pentacosane (C25H52), for which the basic experimental phase diagram data are presented.