Liquid densities of THF and excess volumes for the mixture with water in a wide temperature and pressure range |
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Authors: | Andre Schedemann,E. Christian Ihmels,Jü rgen Gmehling |
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Affiliation: | 1. Technische Chemie, Universität Oldenburg, 26111 Oldenburg, Germany;2. LTP (Laboratory for Thermophysical Properties) GmbH, Marie-Curie-Str. 10, 26129 Oldenburg, Germany |
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Abstract: | In this paper densities for THF (tetrahydrofuran) and THF + water mixtures measured with the help of the Anton Paar DMA HPM vibrating tube densimeter are reported. The pure component densities of tetrahydrofuran measured in the temperature range from 278 to 437 K and pressures up to 130 MPa were correlated with the TRIDEN-System. Additionally densities of the binary mixture tetrahydrofuran + water were measured for 6 different concentrations in a temperature range from 288 to 338 K and up to 130 MPa. Excess volumes (vE) of the mixture were determined using the own correlation of the tetrahydrofuran densities and the equation of state (EoS) for water by Wagner and Pruß. Redlich–Kister polynomials were used to fit the vE-data. Additionally in this work it was checked if the vibrating tube densimeter allows the determination of the miscibility gap for the system THF–water as a function of temperature and pressure. |
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Keywords: | Water Tetrahydrofuran (THF) Excess volume Density Miscibility gap |
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