Density, sound speed and derived thermophysical properties of n-nonane at temperatures between (283.15 and 473.15) K and at pressures up to 390 MPa

Tay, Weparn J.; Trusler, J. P. Martin

doi:10.1016/j.jct.2018.04.019

Cited by 23 publications

(30 citation statements)

References 43 publications

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“…Compressed-liquid density measurements were carried out with the experimental set-up described previously. 18,47 The experimental set-up consisted of a vibrating-tube densimeter…”

Section: Compressed-fluid Density Measurementmentioning

confidence: 99%

“…The uncertainty of the bubble- detail in our early papers. 28,45,47 The calculated uncertainties, together with the experimental data are shown in Tables S1, S3, S4 in the Supporting Information. Information with values calculated using multi-parameter reference equations of state.…”

Section: Calibration and Uncertaintymentioning

confidence: 99%

“…The measurements were made out in specialised apparatus and are supported by a detailed assessment of uncertainty. [45][46][47][48] The new experimental data are compared with predictions from the SAFT-γ Mie and PPR-78 equations of state. The data could also be used to optimise binary interaction parameters in either traditional CEOS or the MFHEOS for CO2 + hydrocarbon system.…”

Section: Introductionmentioning

confidence: 99%

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Density and Phase Behavior of the CO₂ + Methylbenzene System in Wide Ranges of Temperatures and Pressures

Sánchez-Vicente

Tay

Ghafri

et al. 2020

Ind. Eng. Chem. Res.

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Knowledge of the thermophysical properties of CO2-hydrocarbon mixtures over extended ranges of temperature and pressure is crucial in the design and operation of many carbon capture and utilization processes. In this paper, we report saturated-phase densities, compressed-liquid densities and phase behaviour of CO2 + methylbenzene at temperatures between (283 and 473) K and at pressures up to 65 MPa over the full composition range. The saturated-phase densities were correlated by a recently-developed empirical equation with an absolute average relative deviation (AARD) of about 0.5 %. The compressed-fluid densities were also correlated using an empirical equation with an AARD of 0.3 %. The new data have been compared with the predictions of two equations of state: the predictive Peng-Robinson (PPR-78) equation of state and the SAFT- Mie equation of state. In both of these models, binary parameters are estimated using functional group contributions. Both models provided satisfactory representation of the vapour-liquid equilibrium and saturated-phase-density data, but the accuracy decreased in the prediction of the compressed-liquid densities where the AARD was about 2 %. The isothermal compressibility and isobaric expansivity are also reported here, and were predicted better with SAFT-γ Mie than with PPR-78. Overall, the comparisons showed that SAFT-γ Mie performs somewhat better than PPR-78 but the results suggest that further refinement of the SAFT-γ Mie parameter table are required.

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“…Compressed-liquid density measurements were carried out with the experimental set-up described previously. 18,47 The experimental set-up consisted of a vibrating-tube densimeter…”

Section: Compressed-fluid Density Measurementmentioning

confidence: 99%

Section: Calibration and Uncertaintymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Density and Phase Behavior of the CO₂ + Methylbenzene System in Wide Ranges of Temperatures and Pressures

Sánchez-Vicente

Tay

Ghafri

et al. 2020

Ind. Eng. Chem. Res.

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“…The apparatus used in this study to measure the density was a slightly modified version of that described in detail by Tay et al [32]. The main components were a vibrating-tube densimeter (VTD, Anton-Paar model DMA HP), a piston-driven pump (Teledyne Isco Series D single-pump, 100DM), a vacuum pump, and pressure and temperature sensors.…”

Section: Apparatus Descriptionmentioning

confidence: 99%

“…The pressure was measured with a high-precision digital pressure sensor (Keller model PA-33X, 70 MPa full scale) with a manufacturer's stated expanded uncertainty (k = 1.73) of 0.035 MPa (0.05 % of the full scale pressure). The VTD cell temperature was measured by an internal Pt100 sensor with an expanded (k = 1.73) uncertainty of 0.05 K [32].…”

Section: Apparatus Descriptionmentioning

confidence: 99%

Experimental density and an improved Helmholtz-energy-explicit mixture model for (CO2 + CO)

2019

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This study reports new density measurements of the (CO2 + CO) system at temperatures from (283 to 373) K and pressures up to 48 MPa for four different mixtures, with compositions ranging from (5 to 50) mol% CO. A commercial vibrating-tube densimeter was used to measure the density of each mixture as a function of pressure and temperature. Temperature and pressure were measured with expanded uncertainties (k = 2) of 0.05 K and 0.035 MPa, respectively. The relative combined expanded uncertainty (k = 2) of the density was estimated to be between (0.2 and 1.8) %, with values ≤ 1 % for most state points. The new data significantly expand the pressure and composition ranges of the available density data for the (CO2 + CO) system. Together with recently published vapourliquid-equilibrium data, the new data enabled the development of an improved Helmholtz-energyexplicit mixture model. The new model is based on the mathematical approach of the GERG-2008 and EOS-CG models with new adjustable parameters. As a result, the new mixture model allows for a significantly more accurate description of the thermodynamic properties of the (CO2 + CO) system than GERG-2008 and EOS-CG. A detailed comparison among our density data, experimental data from the literature and the different mixture models is presented.

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Thermodynamic Properties of Liquid Toluene from Speed-of-Sound Measurements at Temperatures from 283.15 K to 473.15 K and at Pressures up to 390 MPa

et al. 2021

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We report the speeds of sound in liquid toluene (methylbenzene) measured using double-path pulseecho apparatus independently at The University of Western Australia (UWA) and Imperial College London (ICL). The UWA data were measured at temperatures between (306 and 423) K and at pressures up to 65 MPa with standard uncertainties of between (0.02 and 0.04) %. At ICL, measurements were made at temperatures between (283.15 and 473.15) K and at pressures up to 390 MPa with standard uncertainty of 0.06 %. By means of thermodynamic integration, the measured sound-speed data were combined with initial density and isobaric heat capacity values obtained from extrapolated experimental data to derive a comprehensive set of thermodynamic properties of liquid toluene over the full measurement range. Extensive uncertainty analysis was performed by studying the response of derived properties to constant and dynamic perturbations of the sound-speed surface, as well as the initial density and heat capacity values. The relative expanded uncertainties at 95 % confidence of derived density, isobaric heat capacity, isobaric expansivity, isochoric heat capacity, isothermal compressibility, isentropic compressibility, thermal pressure coefficient and internal pressure were estimated to be (0.2, 2.2, 1.0, 2.6, 0.6, 0.2, 1.0 and 2.7) %, respectively. Due to their low uncertainty, these data and derived properties should be well-suited for developing a new and improved fundamental Helmholtz equation of state for toluene.

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Density, sound speed and derived thermophysical properties of n-nonane at temperatures between (283.15 and 473.15) K and at pressures up to 390 MPa

Cited by 23 publications

References 43 publications

Density and Phase Behavior of the CO₂ + Methylbenzene System in Wide Ranges of Temperatures and Pressures

Density and Phase Behavior of the CO₂ + Methylbenzene System in Wide Ranges of Temperatures and Pressures

Experimental density and an improved Helmholtz-energy-explicit mixture model for (CO2 + CO)

Thermodynamic Properties of Liquid Toluene from Speed-of-Sound Measurements at Temperatures from 283.15 K to 473.15 K and at Pressures up to 390 MPa

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Density, sound speed and derived thermophysical properties of n-nonane at temperatures between (283.15 and 473.15) K and at pressures up to 390 MPa

Cited by 23 publications

References 43 publications

Density and Phase Behavior of the CO2 + Methylbenzene System in Wide Ranges of Temperatures and Pressures

Density and Phase Behavior of the CO2 + Methylbenzene System in Wide Ranges of Temperatures and Pressures

Experimental density and an improved Helmholtz-energy-explicit mixture model for (CO2 + CO)

Thermodynamic Properties of Liquid Toluene from Speed-of-Sound Measurements at Temperatures from 283.15 K to 473.15 K and at Pressures up to 390 MPa

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Product

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Density, sound speed and derived thermophysical properties of n-nonane at temperatures between (283.15 and 473.15) K and at pressures up to 390 MPa

Density and Phase Behavior of the CO₂ + Methylbenzene System in Wide Ranges of Temperatures and Pressures

Density and Phase Behavior of the CO₂ + Methylbenzene System in Wide Ranges of Temperatures and Pressures

Experimental density and an improved Helmholtz-energy-explicit mixture model for (CO2 + CO)