Differential scanning calorimetry determination of phase diagrams and water activities of aqueous carboxylic acid solutions
作者： Sajjad Noshadi , Rahmat Sadeghi
DOI: 10.1016/J.TCA.2018.03.002
关键词:
摘要: Abstract We have investigated the solid-liquid equilibria phase diagrams and water activities of several carboxylic acid/water binary systems using differential scanning calorimetry (DSC) method. These mixtures were formed by low molecular weight acids (formic acid, acetic propionic acid butyric acid). Water solutions obtained from freezing point depression data in range ice melting envelope. The experimental results indicated that all aqueous present a eutectic their respective diagrams. activity coefficients two components liquid used to adjust parameters Wilson NRTL models. For systems, best correlations solid–liquid equilibrium been determined model. Finally, behaviors compared ideal state influence chemical structure on magnitude deviation was discussed.
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