Dielectric, electro-optical and thermodynamic investigation of binary mixtures formed by pyridine with hydrocarbons and chlorobenzene

Malanowski, Stanisław K.; Patz, Renate; Rätzsch, M.; Wohlfarth, Ch.

doi:10.1016/0378-3812(79)80003-5

Cited by 20 publications

(4 citation statements)

References 18 publications

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“…Values estimated by Das et al (2) in their recent review and by Kudchadker and Kudchadker (75) in an earlier review, are also shown. (1) T, Malanowski et al; (56) (2) his book, (25) published in 1950, appear to be the experimental density values from the research published in 1907. The citation given by Timmermans (25) to a paper published in 1920 is incorrect.…”

Section: Saturation Densities and The Critical Densitymentioning

confidence: 85%

“…The coefficients were derived with selected experimental densities. (1,46,47,49,52,56,58) Values calculated with corresponding states {equation (2)} were included for temperatures above 400 K to ensure smooth continuity between equation (2) and equation (3). Equation (2) is recommended for the calculation of densities for Tq450 K. The selected critical density is given to more significant figures than is justified by the available experimental results to eliminate round-off errors in the use of equations (2) and (3).…”

Section: Saturation Densities and The Critical Densitymentioning

confidence: 99%

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Thermodynamic properties of pyridine—II. Comparisons of new recommended values with the literature

Chirico¹,

Steele²

1996

The Journal of Chemical Thermodynamics

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Section: Saturation Densities and The Critical Densitymentioning

confidence: 85%

Section: Saturation Densities and The Critical Densitymentioning

confidence: 99%

Thermodynamic properties of pyridine—II. Comparisons of new recommended values with the literature

Chirico¹,

Steele²

1996

The Journal of Chemical Thermodynamics

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“…where ε′ is the dielectric constant, as the real part of the relative permittivity, C P is the capacitance of the model lipid corrected for "stray" capacitance, and K c is the mean cell constant. Following Midmore et al 18 the cell constant and stray capacitance were determined from measurements made with air and cyclohexane, Sigma-Aldrich 227048, 19 at each temperature. The mean cell constant and stray capacitance were computed by averaging the results determined in the optimal frequency range from 10 to 500 kHz.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Correlation of Basic Oil Quality Indices and Electrical Properties of Model Vegetable Oil Systems

Prevc

Cigić

Vidrih

et al. 2013

J. Agric. Food Chem.

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Model vegetable oil mixtures with significantly different basic oil quality indices (free fatty acid, iodine, and Totox values) were prepared by adding oleic acids, synthetic saturated triglycerides, or oxidized safflower oil ( Carthamus tinctorius ) to the oleic type of sunflower oil. Dielectric constants, dielectric loss factors, quality factors, and electrical conductivities of model lipids were determined at frequencies from 50 Hz to 2 MHz and at temperatures from 293.15 to 323.15 K. The dependence of these dielectric parameters on basic oil quality indices was investigated. Adding oleic acids to sunflower oil resulted in lower dielectric constants and conductivities and higher quality factors. Reduced iodine values resulted in increased dielectric constants and quality factors and decreased conductivities. Higher Totox values resulted in higher dielectric constants and conductivities at high frequencies and lower quality factors. Dielectric constants decreased linearly with temperature, whereas conductivities followed the Arrhenius law.

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“…Once again, the first reference considers self-association according to the 2B scheme and the second neglects both the association and the polarity. Figure S1 in the Supporting Information compares the predictions of CP-PC-SAFT and these versions of PC-SAFT in predicting vapor pressure, densities of saturated phases, and sound velocities at atmospheric pressure in pure pyridine. − Despite the deviations between different sources reporting the vapor pressures, it can be seen that while CP-PC-SAFT slightly underpredicts these data at low temperatures and PC-SAFT of van Niekerk et al overpredicts them at the high ones, PC-SAFT of Razavi et al yields the more accurate modeling. At the same time, this approach substantially overestimates T c , which affects its accuracy in modeling the near-critical densities.…”

Section: Resultsmentioning

confidence: 99%

Application of CP-PC-SAFT and PC-SAFT for Simultaneous Prediction of LLE and High-Pressure VLE with Universal k₁₂ Values in Systems of Gases and n-Alkanes with N-Methyl-2-pyrrolidone and Some Substituted Aromatic Compounds

Fredj Elias,

Polishuk

2024

Ind. Eng. Chem. Res.

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This study examines the accuracy of the simplest polarity-and association-neglecting forms of the critical point-based revision of perturbed chainstatistical association fluid theory (CP-PC-SAFT) predicting phase equilibria in the systems of N-methyl-2-pyrrolidone (NMP) with n-alkanes and nonpolar gases using the universal value of the binary parameter k 12 = 0.023. Previously, this value was obtained for the propane−phenol system, and its applicability for predicting phase equilibria in systems of various substituted aromatic and cyclic compounds by CP-PC-SAFT is assessed. It is found that this approach accurately predicts highpressure vapor−liquid ones (VLE) in the systems of NMP with nitrogen, methane, ethane, and carbon dioxide, slightly overestimates the solubility of argon in NMP, and overpredicts immiscibility in the systems of propane and n-butane. Additionally, despite some scattering, CP-PC-SAFT yields reliable predictions of the upper critical solution temperature (UCST) data in the systems of NMPheavier n-alkanes including n-hexadecane. It is also found that similar to the previously considered systems of substituted aromatic compounds, CP-PC-SAFT accurately estimates the compositions of the NMP-rich LLE phases but overpredicts the content of NMP in the n-alkane-rich ones. These results are compared with the predictions of PC-SAFT with various sets of pure compound parameters for NMP and the previously investigated substituted aromatic compounds. It appears that the lack of a standardized PC-SAFT parametrization scheme represents a significant obstacle to the implementation of this model to systems of different solvents with transferrable universal k 12 values. At the same time, PC-SAFT approaches that consider self-association may predict broader LLE phase splits. Incorporating LLE data into the parametrization procedures of such approaches can significantly improve accuracy at the expense of predictive capability.

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Dielectric, electro-optical and thermodynamic investigation of binary mixtures formed by pyridine with hydrocarbons and chlorobenzene

Cited by 20 publications

References 18 publications

Thermodynamic properties of pyridine—II. Comparisons of new recommended values with the literature

Thermodynamic properties of pyridine—II. Comparisons of new recommended values with the literature

Correlation of Basic Oil Quality Indices and Electrical Properties of Model Vegetable Oil Systems

Application of CP-PC-SAFT and PC-SAFT for Simultaneous Prediction of LLE and High-Pressure VLE with Universal k₁₂ Values in Systems of Gases and n-Alkanes with N-Methyl-2-pyrrolidone and Some Substituted Aromatic Compounds

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Dielectric, electro-optical and thermodynamic investigation of binary mixtures formed by pyridine with hydrocarbons and chlorobenzene

Cited by 20 publications

References 18 publications

Thermodynamic properties of pyridine—II. Comparisons of new recommended values with the literature

Thermodynamic properties of pyridine—II. Comparisons of new recommended values with the literature

Correlation of Basic Oil Quality Indices and Electrical Properties of Model Vegetable Oil Systems

Application of CP-PC-SAFT and PC-SAFT for Simultaneous Prediction of LLE and High-Pressure VLE with Universal k12 Values in Systems of Gases and n-Alkanes with N-Methyl-2-pyrrolidone and Some Substituted Aromatic Compounds

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Application of CP-PC-SAFT and PC-SAFT for Simultaneous Prediction of LLE and High-Pressure VLE with Universal k₁₂ Values in Systems of Gases and n-Alkanes with N-Methyl-2-pyrrolidone and Some Substituted Aromatic Compounds