High-Pressure Densities and Derived Thermodynamic Properties of Cyclopentane/n-Octane Mixtures from 293.15 K to 363.15 K

Ma, Yutian; Yu, Jinxiang; Wang, Xiaopo

doi:10.1007/s10765-022-03153-3

Int J Thermophys

2023

DOI: 10.1007/s10765-022-03153-3

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High-Pressure Densities and Derived Thermodynamic Properties of Cyclopentane/n-Octane Mixtures from 293.15 K to 363.15 K

Yutian Ma

Jinxiang Yu

Xiaopo Wang

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2024

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Cited by 4 publications

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Utilization of a High-Pressure Vibrating Tube Densimeter for Liquids at Temperatures Down to 100 K

von Preetzmann,

Zipplies,

Span

et al. 2024

Int J Thermophys

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A high-pressure vibrating tube densimeter, specified by the manufacturer for temperatures from (263 to 473) K at pressures up to 140 MPa, was tested at temperatures down to 100 K and from vacuum to pressures up to 10 MPa. To verify the functionality and overall performance under these conditions, the densimeter was calibrated with measurements under vacuum as well as methane and propane as reference fluids. The calibration range is T = (120 to 200) K at pressures from (2.0 to 10.0) MPa. To evaluate the recorded data, two established calibration models were used to describe the dependence of the densimeter's oscillation period on the investigated reference fluids' temperature, pressure, and density. The experiments showed that the vibrating tube densimeter is operational even at temperatures down to 100 K, but exhibits a shift of its vacuum resonance when subjected to thermal cycling at temperatures below 180 K. Accordingly, the calibration models were modified with respect to how the vacuum resonance is considered. Then, the determined calibration parameters reproduce the densities of the reference fluids within ± 0.10 kg·m−3 for the calibration model that performed better for the present study. Measurements on pure ethane and argon validate the calibration of the densimeter. Here, the densities are within (− 0.47 to 0.16) kg·m−3 of values calculated with the respective reference equation of state. The estimated combined expanded uncertainty (k = 2) in density for the validation measurements ranges from (0.52 to 1.13) kg·m−3 or is less than 0.1 % for liquid densities.

show abstract

Utilization of a High-Pressure Vibrating Tube Densimeter for Liquids at Temperatures Down to 100 K

von Preetzmann,

Zipplies,

Span

et al. 2024

Int J Thermophys

View full text Add to dashboard Cite

show abstract

Investigation on the Characteristics of Tetrabutylammonium Chloride Based Deep Eutectic Solvent Aqueous Solution

Zheng,

Yang,

Tan

et al. 2024

Int J Thermophys

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High-Pressure Density of Eutectic Mixtures Containing dl-Menthol and Acetic Acid

Yu,

Zhang,

Wang

2024

Int J Thermophys

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High-Pressure Densities and Derived Thermodynamic Properties of Cyclopentane/n-Octane Mixtures from 293.15 K to 363.15 K

Cited by 4 publications

References 43 publications

Utilization of a High-Pressure Vibrating Tube Densimeter for Liquids at Temperatures Down to 100 K

Utilization of a High-Pressure Vibrating Tube Densimeter for Liquids at Temperatures Down to 100 K

Investigation on the Characteristics of Tetrabutylammonium Chloride Based Deep Eutectic Solvent Aqueous Solution

High-Pressure Density of Eutectic Mixtures Containing dl-Menthol and Acetic Acid

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