Isobaric Vapor鈥揕iquid Equilibrium and Isothermal Interfacial Tensions for the System Ethanol + 2,5-Dimethylfuran

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• 作者：Andr茅s Mej铆a ; Hugo Segura ; Marcela Cartes
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2013
• 出版时间：November 14, 2013
• 年：2013
• 卷：58
• 期：11
• 页码：3226-3232
• 全文大小：310K
• 年卷期：v.58,no.11(November 14, 2013)
• ISSN：1520-5134

文摘

This work reports isobaric vapor鈥搇iquid equilibrium (VLE) data experimentally determined at (50, 75, and 94) kPa and over the temperature range (334 to 364) K together with atmospheric interfacial tensions (IFT) measured at 298.15 K for the binary system composed by ethanol + 2,5-dimethylfuran. VLE determinations were carried out in a dynamic VLE cell, whereas a maximum differential bubble pressure tensiometer was used for performing IFT measurements. According to the experimental results, the binary system ethanol + 2,5-dimethylfuran exhibits positive deviation from ideal behavior and azeotropic behavior can be observed over the whole determined pressure range. The concentration of the azeotrope enriches in ethanol as pressure (and/or temperature) increases. The interfacial tension in turn, exhibits positive deviation from the linear behavior. The reported VLE data of the binary mixture are thermodynamically consistent according to Fredenlund鈥檚 test and were well correlated by traditional activity coefficient models (such as the Wohl, nonrandom two-liquid, Wilson, and the universal quasi-chemical equations) for all of the measured isobars. Finally, the Myers鈥揝cott equation was found to be suitable for correlating the interfacial tensions of the mixture.