Vapor-liquid equilibrium data of binary mixtures of 1-Hexanol (cas 111-27-3), 1-heptanol, 1-nonanol and 1,3-propanediol at P = 101.3 kPa using differential scanning calorimetry (DSC)

Add time:08/27/2019    Source:sciencedirect.com

In this study, the vapor-liquid equilibrium data for of six binary pairs made up from 1-hexanol, 1-heptanol, 1-nonanol and 1,3-propanediol at P = 101.3 kPa are presented. Differential scanning calorimetry (DSC) was used to obtain the equilibrium data for each pair binary system. The experimental data were correlated using different activity coefficient models. Results showed that the binary pair consisting of 1-nonanol and 1,3-propanediol was the only pair that contains an azeotrope point. This azeotrope occurred at a 1-nonanol molar composition of 0.4501 and temperature of 474.44 K. The experimental data showed high level of accuracy for the pure component vapor pressure, compared to reported values in literature using differential thermal analysis and other conventional methods. Also, a modified van Ness test showed that the gathered experimental equilibrium data for mixtures had a high level of thermodynamic correlation accuracy.

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