Measurement of the Infinite Dilute Activity Coefficients and Diffusion Coefficients of Water and Straight Chain Alcohols in Cross-Linked Polyvinyl Alcohol by Inverse Gas Chromatography

Abstract

The infinite dilute activity coefficients and diffusion coefficients of water, methanol, ethanol, 1-propanol, 1-butanol, and 1-pentanol in cross-linked polyvinyl alcohol (PVA) were measured in the temperature range of (363.15 to 413.15) K by inverse gas chromatography. The cross-linked PVA was obtained by dissolving PVA, cross-linking agent, and catalyst in water and characterized by FTIR spectra. The van Deemter equation was used to obtain diffusion coefficients of solvents from the variation of chromatographic peak under the different flow rates of carrier gas. The interdependence on the infinite dilute diffusion coefficient and temperature follows the Arrhenius equation. Pre-exponential factor and activation energy are obtained from the Arrhenius equation.