Experimental measurements and prediction of liquid densities for n-alkane mixtures |
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| Affiliation: | 1. Facultad de Ingenierı́a Quı́mica, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mich. CP 58060, Mexico;2. Departamento de Ingenierı́a Quı́mica, Instituto Tecnológico de Celaya Celaya, Gto. CP 38010, Mexico;3. Chemical Engineering Department, Texas A&M University, College Station, TX 77843-3122, USA;1. Research Center of Supercritical Fluid Technology, Tohoku University, Aramaki Aza Aoba 6-6-11, Aoba-ku, Sendai 980-8579, Japan;2. Graduate School of Environmental Studies, Tohoku University, Aramaki Aza Aoba 6-6-11, Aoba-ku, Sendai 980-8579, Japan;1. Leibniz Institute of Photonic Technology (IPHT), Jena, 07745, Albert-Einstein-Str. 9, Germany;2. Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University, Jena, 07743, Helmholtzweg 4, Germany;3. The Danish National Research Foundation and Villum Foundation''s Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, Ørsteds Plads Building 345C, Kgs. Lyngby 2800, Denmark;4. Faculty of Radiophysics, Electronics and Computer Systems, Taras Shevchenko National University of Kyiv, 64 Volodymyrska Str., 01601 Kyiv, Ukraine |
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| Abstract: | We present experimental liquid densities for n-pentane, n-hexane and n-heptane and their binary mixtures from (273.15 to 363.15) K over the entire composition range (for the mixtures) at atmospheric pressure. A vibrating tube densimeter produces the experimental densities. Also, we present a generalized correlation to predict the liquid densities of n-alkanes and their mixtures. We have combined the principle of congruence with the Tait equation to obtain an equation that uses as variables: temperature, pressure and the equivalent carbon number of the mixture. Also, we present a generalized correlation for the atmospheric liquid densities of n-alkanes. The average absolute percentage deviation of this equation from the literature experimental density values is 0.26%. The Tait equation has an average percentage deviation of 0.15% from experimental density measurements. |
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