Abstract
Solid-liquid equilibria (SLE) for the three following binary systems have been measured by the differential scanning calorimetry (DSC): 2-methylbenzoic acid + 3-methylbenzoic acid, 2-methoxybenzoic acid + 3-methylbenzoic acid, N-phenylacetamide + benzamide. Each of these systems appears to be a simple eutectic system. The SLE measurements of the organic components in this study are helpful for fitting reliable temperature-dependent parameters by group contribution methods such as modified UNIFAC model. The activity coefficient model is found to accurately represent the nonideality of the liquid-phase in the investigated systems. The Wilson model is employed to correlate the solid-liquid equilibrium data. It is demonstrated that the SLE phase boundaries are correlated well with the experimental results. The heat generation rate and fraction of transformation were calculated using the Gray’s model. Applying the fractional transformation method, the eutectic points were also easily determined.
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