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

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• 作者：Ding Wang ; Jiding Li ; Chuyi Zeng ; Jian Chen ; Cuixian Chen
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2007
• 出版时间：March 2007
• 年：2007
• 卷：52
• 期：2
• 页码：368 - 372
• 全文大小：68K
• 年卷期：v.52,no.2(March 2007)
• ISSN：1520-5134

文摘

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 to413.15) K by inverse gas chromatography. The cross-linked PVA was obtained by dissolving PVA, cross-linkingagent, and catalyst in water and characterized by FTIR spectra. The van Deemter equation was used to obtaindiffusion coefficients of solvents from the variation of chromatographic peak under the different flow rates ofcarrier gas. The interdependence on the infinite dilute diffusion coefficient and temperature follows the Arrheniusequation. Pre-exponential factor and activation energy are obtained from the Arrhenius equation.