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Liquid Viscosity and Surface Tension of n-Hexane, n-Octane, n-Decane, and n-Hexadecane up to 573 K by Surface Light Scattering (SLS)

Published

Author(s)

Tobias Klein, Shaomin Yan, Junwei Cui, Joe W. Magee, Kenneth Kroenlein, Michael H. Rausch, Thomas M. Koller, Andreas P. Froba

Abstract

In the present study, the simultaneous and accurate determination of liquid viscosity and surface tension of the n-alkanes n-hexane (n-C6H14), n-octane (n-C8H18), n-decane (n-C10H22), and n-hexadecane (n-C16H34) by surface light scattering (SLS) in thermodynamic equilibrium is demonstrated. Measurements have been performed over a wide temperature range from 283.15 K up to 473.15 K for n-C6H14, 523.15 K for n-C8H18, and 573.15 K for n-C10H22 as well as n-C16H34. The liquid dynamic viscosity and surface tension data with average total measurement uncertainties (k = 2) of 2.0 % and 1.7 % agree with the available literature and contribute to a new database at high temperatures. Over the entire temperature range, a Vogel-type equation for the dynamic viscosity and a modified van der Waals equation for the surface tension represent the measured data for the four n-alkanes within experimental uncertainties. By also considering our former SLS data for n-dodecane (n-C12H26) and n-octacosane (n-C28H58), empirical models for the liquid viscosity and surface tension of n-alkanes were developed as a function of temperature and carbon number covering values between 6 and 28. Agreement between these models and reference correlations for further selected n-alkanes which were not included in the development procedure was found.
Citation
Journal of Chemical and Engineering Data
Volume
64

Keywords

n-alkanes, liquid, high temperature, high pressure, viscosity, surface tension, surface light scattering

Citation

Klein, T. , Yan, S. , Cui, J. , Magee, J. , Kroenlein, K. , Rausch, M. , Koller, T. and Froba, A. (2019), Liquid Viscosity and Surface Tension of n-Hexane, n-Octane, n-Decane, and n-Hexadecane up to 573 K by Surface Light Scattering (SLS), Journal of Chemical and Engineering Data, [online], https://doi.org/10.1021/acs.jced.9b00525, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=928174 (Accessed May 29, 2023)
Created August 15, 2019, Updated October 12, 2021