화학공학소재연구정보센터
Journal of Chemical Thermodynamics, Vol.87, 88-95, 2015
Isobaric (vapor plus liquid) equilibria for the binary systems (1-methoxy-2-propanol+2-methoxyethanol), (2-butanone+2-methoxyethanol) and (water+2-methoxyethanol) at pressures of (74.5, 101.3, and 134.0) kPa
Isobaric (vapor + liquid) equilibria of three binary systems (1-methoxy-2-propanol + 2-methoxyethanol), (2-butanone + 2-methoxyethanol) and (water + 2-methoxyethanol), was measured using an apparatus with dynamic recirculation and gas chromatography analysis for both phases. The measurements were carried out at pressures of (74.5, 101.3, and 134.0) kPa and temperature ranged from (343 to 407) K. No partial liquid miscibility was observed for any of the systems studied. Azeotropic behavior was verified for the system (water + 2-methoxyethanol) at the water-rich region. Thermodynamic modeling of the data measured was successfully accomplished for (2-butanone + 2-methoxyethanol) and (water + 2-methoxyethanol). In order to represent the no-ideality of the liquid phase, three alternatives for the activity coefficient model were used, Non Random Two Liquid, van Laar and Wilson. Results showed that the relative root mean square deviations from the experimental molar fractions were, <12% for the vapor phase, and <1% for the liquid phase. (C) 2015 Elsevier Ltd. All rights reserved.