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Density measurements of squalane using single-sinker and vibrating-tube densimeters
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SYSNO ASEP 0588171 Document Type A - Abstract R&D Document Type The record was not marked in the RIV R&D Document Type Není vybrán druh dokumentu Title Density measurements of squalane using single-sinker and vibrating-tube densimeters Author(s) Blahut, Aleš (UT-L) RID, ORCID
Prokopová, Olga (UT-L) ORCID
Vinš, Václav (UT-L) RID, ORCID
Soba, L. (DE)
Thol, M. (DE)
Span, R. (DE)Number of authors 6 Year of issue 2024 Source Title Twenty-Second Symposium on Thermophysical Properties and Eighteenth International Conference on the Properties of Water and Steam. - Boulder, 2024 Number of pages 1 s. Publication form Online - E Action Symposium on Thermophysical Properties /22./ and International Conference on the Properties of Water and Steam /18./ Event date 23.06.2024 - 28.06.2024 VEvent location Colorado Country US - United States Event type WRD Language eng - English Country US - United States Keywords squalane ; density ; single-sinker densimeter ; vibrating tube densimeter OECD category Thermodynamics R&D Projects EF18_053/0017555 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UT-L - RVO:61388998 Annotation Squalane, an oily long-chain alkane (C30H62), has been identified as a promising reference material for viscosity measurements of petroleum fluids under typical reservoir conditions covering high temperatures and pressures. To meet the need for a reliable reference equation, several correlations for the viscosity and density of squalane have been developed over the last decade, incorporating numerous recent experimental data. In the case of liquid densities, a significant amount of the underlying data has been obtained using the vibrating tube method, which however has certain accuracy limitations when measuring viscous liquids such as squalane. Typically, an instrument automatic built-in correction or some semi-empirical formulas are used to account for the effect of viscosity on the resulting density. This contribution presents new accurate liquid density data for squalane from 293 K to 453 K and from near ambient pressure up to 20 MPa, measured with a single-sinker magnetic-suspension densimeter, which are considered to be insensitive to sample viscosity. Simultaneously, new data acquired with a commercially available vibrating tube densimeter (VTD) on the same batch of squalane are presented. The performance of the VTD calibrated with dry air and water using automatic instrument correction for the sample viscosity can thus be evaluated.
New results successfully correlated with the Tait equation within an experimental uncertainty of less than 0.01 % are also compared with selected literature data.
Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2025
Number of the records: 1