Phase behaviour of 1-alkanol + alkane mixtures: gas-liquid critical temperatures

• Published in: Fluid phase equilibria Vol. 67; pp. 259 - 271
• Main Authors: Christou, Georgia, Sadus, Richard J., Young, Colin L.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.11.1991; Elsevier Science
• Subjects: Chemistry; Exact sciences and technology; General and physical chemistry; Solution properties; Solutions; Gas liquid; Intermolecular interaction; Critical property; Hydrocarbon; Aliphatic compound; Binary system; Saturated compound; Critical temperature; Experimental study; Primary alcohol; Interaction parameter
• ISSN: 0378-3812; 1879-0224
• DOI: 10.1016/0378-3812(91)90060-K

Christou G., Sadus R.J. and Young C.L., 1991. Phase behaviour of 1-alkanol + alkane mixtures: gas-liquid critical temperatures. Fluid Phase Equilibria, 67: 259-271. The gas-liquid critical temperatures of several 1-alkanol and hydrocarbon mixtures are reported. The critical temperatures have also been calculated from the one-fluid model and the “hard sphere + attractive term” equation of state due to Guggenheim. The agreement is quite good for mixtures of similar-size molecules. The analysis provides values of an adjustable parameter, ξ, which reflects the strength of unlike intermolecular interaction. The values of ξ are discussed in terms of the influence of hydrogen bonding and dipole forces. Mixtures in which hydrogen bonding and dipole forces are important have ξ values which are less than would otherwise be expected. The deviation of the experimental critical temperatures from linearity between the critical temperatures of the two pure components is discussed qualitatively. The observed deviations are consistent with expected effects of the dipolar interactions and the difference in critical temperature of the pure components.