Measurement of phase equilibrium and interfacial tension for the (1-propanol + cyclopentyl methyl ether) binary mixture

Abstract

Vapour – liquid equilibrium and interfacial tension for 1-propanol + cyclopentyl methyl ether binary mixture have been experimentally measured in the whole mole fraction range. Vapour – liquid equilibrium determinations have been carried out in an all-glass dynamic Guillespie cell over the temperature range from 352.7 K to 375.8 K at three isobaric conditions 50, 75, and 94 kPa. interfacial tension has been measured using a maximum differential bubble pressure tensiometer at 298.15 K and 101.33 kPa.According to the experimental results of vapour – liquid equilibrium, the 1-propanol + cyclopentyl methyl ether binary mixture presents positive deviation from the ideal behaviour with a minimum temperature azeotropic over the whole explored pressure range. The azeotropic mole fraction increases in 1-propanol as pressure and/or temperature increases. For the case of interfacial tension, this binary mixture displays positive deviation from the linear behaviour and decreases as the 1-propanol liquid mole fraction increases.The reliability of the reported vapour – liquid equilibrium data is verified by the Fredenlund's consistency thermodynamic test, and the isobaric phase equilibria data are well-correlated by Margules, Wilson, NRTL, and UNIQUAC activity coefficients models, where the NRTL and UNIQUAC models provide the best fit. Finally, the measurements of the interfacial tension of the mixture are satisfactorily correlated by using three parameters of the Myers-Scott equation.