P-ρ-T data and modelling for (2-methylpropan-1-ol + n-octane or n-decane) between 313.15 K–353.15 K and 0.1–20 MPa

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The effect of pressure and temperature on the densities of mixtures of propan-2-ol (1) + n-octane (2)/n-decane (2) was measured using an Anton Paar DMA HP densimeter and a pressurizing circuit. Measurements were conducted for the entire composition range of the mixtures and pure propan-2-ol in the range of 0.1−20 MPa (21 pressure permutations) and six temperatures in the range of 303.15−353.15 K. The data were correlated by the empirical modified Toscani−Szwarc equation of state with five parameters for each composition. The excess molar volume, thermal expansivity, and isothermal compressibility were derived from the experimental data and the regressed model parameters.

Section: Methodsmentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

“…The apparatus used for the high-pressure density measurements was described in previous work by Moodley and co-workers − , and is shown in Figure .…”

Section: Experimental Sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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P–ρ–T Data for Propan-2-ol + n-Octane or n-Decane in the Ranges of 303.15–353.15 K and 0.1–20 MPa

Moodley

2021

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Measurements of P-ρ-T for Propan-1-ol or Propan-2-ol + Oct-1-ene between 303.15–353.15 K and 0.1–20 MPa

Moodley

2022

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The densities of mixtures of C3 alcohols with oct-1-ene were measured in a temperature and pressure range of T = 303.15–353.15 K and P = 0.1–20 MPa by employing an Anton Paar DMA HP densimeter and a high-pressure network. This data is of use in hydrocarbon process industries where alcohols can be used as an additive, a blend stock, or an inhibitor. The density data were correlated using the Toscani-Szwarc equation of state with 5 unique model variables for each mixture/pure component. The excess molar volume, thermal expansivity, and isothermal compressibility were determined by calculation using the regressed correlation parameters. A significant difference in the excess volume behavior was observed between the two alcohols in the alkene, with the propan-2-ol mixture exhibiting a more symmetrical positive excess volume behavior with a magnitude greater than twice that of the propan-1-ol mixture at similar conditions.

Measuring and Modeling the Density of Some Typical Binary Mixtures in the Conditions of 280–423.15 K and 0.1–9 MPa

Wang,

Yao,

et al. 2023

In order to investigate the interactive effect on the density of two-component mixtures, six mixtures of methylcyclohexane(1) + n-dodecane(2)/n-tetradecane(2)/n-hexadecane(2) and ethylcyclohexane(1) + n-dodecane(2)/n-tetradecane(2)/nhexadecane(2) were measured by using the Anton Paar DMA 4200 M densimeter and a hand-operated pressure pump in the temperature and pressure ranges of T = 280 to 423.15 K and P = 0.1 to 9 MPa, respectively. Additionally, the combined standard uncertainty in the density of binary mixtures with n-hexadecane is u c (ρ) = 1.543 kg/m 3 , and for other mixtures, it is u c (ρ) = 1.541 kg/ m 3 . The experimental data were successfully correlated with the empirically modified Toscani−Szwarc equation of state with a maximum regression deviation of less than 1.0630 kg/m 3 for all the binary mixtures. On the basis of the experimental data and parameters of the regression model, isobaric thermal expansivity and isothermal compressibility were calculated and exhibited nonlinear behavior against the mole fraction, which is due to different molecular interactions between the two components.