Abstract
The critical temperatures and pressures of four binary systems and two ternary systems containing gasoline additives (ethanol+cyclohexane, ethanol+octane, 2-propanol+octane, 2-propanol+decane, ethanol+cyclohexane+octane and 2-propanol+octane+decane) were measured with a low-residence time flow apparatus. The critical properties were determined by observing critical opalescence and phase changes in a quartz glass tube. The expanded uncertainties of critical temperature and pressure were estimated to be less than ±0.4K and ±0.01MPa, respectively. The four binary systems show non-ideal behavior especially for ethanol+cyclohexane and ethanol+octane systems. The experimental data of all binary mixtures could be correlated to within 0.06% with the Redlich–Kister equations. Ternary mixtures are newly reported in this work and were correlated with Cibulka's and Singh's expressions.
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