Liquid Viscosity and Interfacial Tension of Binary and Ternary Mixtures Containing n-Octacosane by Surface Light Scattering

Klein T, Cui J, Kalantar A, Chen J, Rausch MH, Koller TM, Fröba AP (2019)

Publication Language: English

Publication Status: Published

Publication Type: Journal article

Publication year: 2019

Journal

Journal of Chemical and Engineering Data American Chemical Society

Publisher: AMER CHEMICAL SOC

Book Volume: 64

Pages Range: 817-826

Journal Issue: 2

DOI: 10.1021/acs.jced.8b01139

Abstract

In this study, the liquid viscosity and interfacial tension of binary and ternary mixtures containing n-octacosane (n-C28H58) and different byproducts typically found in the Fischer-Tropsch process were investigated. For the binary mixtures having mole fractions of the byproducts between 0.02 and 0.40, the effects of varying branching, alkyl chain length, and degree of oxygenation in selected byproducts on viscosity and interfacial tension were studied. In detail, the isomers n-decane, 2-methylnonane, and 4-methylnonane were used to study differences in branching for alkanes with the same molecular weight. The 1-alcohols ethanol and 1-dodecanol as well as the carboxylic acids formic acid and acetic acid imply variations in the alkyl chain length and degree of oxygenation. In addition, two ternary systems consisting of n-octacosane, n-decane, and ethanol with mole fractions of 0.6 of either n-alkane and 0.2 for each of the other two components were selected. On the basis of the surface light scattering (SLS) method analyzing microscopic surface fluctuations at macroscopic thermodynamic equilibrium, the liquid viscosity and interfacial tension of the studied mixtures could be determined at saturation conditions at temperatures from (373.15 up to 523.15) K with average expanded measurement uncertainties (k = 2) of (2.7 and 2.4)%. Except for systems containing the two branched alkanes showing a distinct decrease in the interfacial tension even at low mole fractions of 0.025, liquid viscosity and interfacial tension at 423 K are not strongly affected with increasing concentration of the byproducts up to 0.10 compared to the values for pure n-octacosane within relative deviations of 10% and 5%. For the studied binary and ternary systems, simple mixing rules for liquid viscosity and interfacial tension based on the corresponding properties of the pure components are discussed.

Authors with CRIS profile

Tobias Klein Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Junwei Cui Michael Rausch Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Thomas Manfred Koller Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Andreas Paul Fröba Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP)

Additional Organisation(s)

Erlangen Graduate School in Advanced Optical Technologies (SAOT)

Related research project(s)

Thermophysical Properties of Long-Chained Hydrocarbons, Alcohols, and their Mixtures with Dissolved Gases Nov. 1, 2018 - March 31, 2022 Investigation of the diffusion coefficient of hydrogen, carbon monoxide, and water in n-alkanes by dynamic light scattering / Experimental investigation of surface tension and viscosity of representative wax samples at reaction conditions Nov. 9, 2015 - Dec. 31, 2017

Involved external institutions

Shell Global Solutions International B.V. NL Netherlands (NL)

How to cite

APA:

Klein, T., Cui, J., Kalantar, A., Chen, J., Rausch, M.H., Koller, T.M., & Fröba, A.P. (2019). Liquid Viscosity and Interfacial Tension of Binary and Ternary Mixtures Containing n-Octacosane by Surface Light Scattering. Journal of Chemical and Engineering Data, 64(2), 817-826. https://doi.org/10.1021/acs.jced.8b01139

MLA:

Klein, Tobias, et al. "Liquid Viscosity and Interfacial Tension of Binary and Ternary Mixtures Containing n-Octacosane by Surface Light Scattering." Journal of Chemical and Engineering Data 64.2 (2019): 817-826.

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