Determination of critical properties for binary and ternary mixtures containing propanol and alkanes using a flow view-type apparatus

Abstract

The critical temperatures and pressures of eight binary systems and two ternary systems (1-propanol+cyclohexane, 1-propanol+n-hexane, 1-propanol+n-heptane, 1-propanol+n-octane, 1-propanol+n-decane, 2-propanol+cyclohexane, cyclohexane+n-hexane, cyclohexane+n-heptane, 1-propanol+cyclohexane+n-heptane and 1-propanol+n-octane+n-decane) were measured using an efficient and accurate low residence time flow apparatus. The uncertainties of the critical temperature and the pressure were estimated to be less than 0.4K and 0.01MPa, respectively. All the critical loci of binary systems belong to the type I or type II as defined by Scott and van Konynenburg. The curves of critical temperatures for the six binary mixtures containing 1-propanol or 2-propanol are non-ideal. Maximum average absolute deviations of the Redlich–Kister equations from the experimental results for the critical temperatures and the critical pressures of all the binary systems are 0.05% and 0.07%, respectively. Moreover, the two ternary systems were correlated by Cibulka's and Singh's expressions with maximum average absolute deviations 0.06% for critical temperatures and 0.83% for critical pressures.