Collect. Czech. Chem. Commun. 1993, 58, 2069-2078

The Effect of Vapour Space Volume on Vapour-Liquid Equilibrium Measured by Stripping with an Inert Gas Stream

Július Surový, Jana Ovečková and Elena Graczová

Department of Chemical and Biochemical Engineering, Slovak Technical University, 812 37 Bratislava, Slovak Republic


The effect of vapour space size when measuring the vapour-liquide equilibrium by a modified saturation method based on the change in the liquid phase concentration with time is studied in this work. The relation was derived for calculating the correction for the vapour space volume. On using some model solutions of different degree of non-ideality and of different concentrations, the magnitude of this correlation and its influence on the calculated vapour-liquid equilibrium data is studied. In case of systems of completely miscible liquids, it is not necessary, as a rule, to expect a more significant effect of the vapour space size on vapor-liquid equilibrium.