The viscosity of liquid toluene at elevated pressures

Dymond, J. H.; Glen, Norman; Isdale, J. D.; Pyda, M.

doi:10.1007/bf02093470

Cited by 45 publications

(62 citation statements)

References 3 publications

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“…Two of the sets of data found in the literature were measured using vibrating-tube densimeters. Those of Dymond et al [20] extend from 298.15 to 348.15 K; those of Malhotra and Woolf [15], from 298.15 to 323.15 K. The claimed accuracy for both these sets is +0.1%. The values recommended by IUPAC [12] were taken as another set.…”

Section: 24-trimethylpentanementioning

confidence: 80%

“…The maximum deviation observed for the densities is _+ 0.05 % and the standard deviation, a, is of +0.03%, while the deviations of the viscosities are smaller than +0.3 %. The densities at 0.1 MPa were correlated with a polynomial equation of the form po(T)= £ d,T' (20) i=0 whose coefficients are listed in Table VI. In the Tait equation the behavior of each isotherm along the pressure range is modeled by the parameter B, which generally exhibits a smooth behavior with temperature. At the critical isotherm, T= T~, one must have B = --Pc [ 15].…”

Section: P B+pomentioning

confidence: 99%

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Validation of an accurate vibrating-wire densimeter: Density and viscosity of liquids over wide ranges of temperature and pressure

Pádua¹,

Fareleira²,

Calado³

et al. 1996

Int J Thermophys

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A new vibrating-wire instrument for the measurement of the density of fluids at high pressures was described in a previous paper. The technique makes use of the buoyancy force on a solid sinker and detects this force with a vibrating wire placed inside the measuring cell. Owing to the simple geometry of the oscillating element there exists a complete theoretical description of its resonance characteristics, enabling the calculation of the density of the fluid from their measurement. In the present paper a new method for the determination of the cell constants is outlined which permits the operation of the densimeter essentially as an absolute instrument. Furthermore, it is shown that the viscosity of the fluid can be measured simultaneously with the density. New results for three fluids are presented: for cyclohexane at temperatures from 298 to 348 K and pressures up to 40 MPa, for 2,2,4-trimethylpentane between 197 and 348 K at 0.1 MPa, and for l,l,l,2-tetrafluoroethane from 197 to 298 K close to saturation. The sets of measurements were chosen with the intention of testing the performance of the apparatus, complementing previous work at higher pressures. The densities and viscosities measured exhibit the same accuracy for all of the three fluids over the entire temperature and pressure ranges and were obtained using the same set of cell parameters The precision of the densities is _+0.03% and their estimated accuracy is +0.05% . The viscosities have a precision of +0.6% and an estimated accuracy of _ 2 %.

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Section: 24-trimethylpentanementioning

confidence: 80%

Section: P B+pomentioning

confidence: 99%

Validation of an accurate vibrating-wire densimeter: Density and viscosity of liquids over wide ranges of temperature and pressure

Pádua¹,

Fareleira²,

Calado³

et al. 1996

Int J Thermophys

View full text Add to dashboard Cite

show abstract

“…Values are required for the density and isobaric heat capacity of the pure fluids and mixtures in order to make a number of small corrections during the analysis of the experimental data. For 2,2,4-trimethylpentane and benzene, the values of the density were taken from the work of Dymond et al [14,15]. For the three mixtures, measurements of the density of mixtures of the same composition over the range df conditions of interest here were performed by Malhotra and Woolf [16] and their results have therefore been employed.…”

Section: Methodsmentioning

confidence: 99%

Thermal conductivity of liquid mixtures of benzene and 2,2,4-trimethylpentane at pressures up to 350 MPa

Mensah-Brown

Wakeham

1994

Int J Thermophys

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This paper contains the results of new measurements of the thermal conductivity of mixtures of benzene and 2,2,4-trimethylpentane in the liquid phase within the temperature range 313 to 344 K at pressures up to 350 MPa. The measurements were carried out with a transient hot-wire instrument and have an estimated accuracy of +0.3%. The study is the first conducted at high pressures on mixtures of components of greatly differing volatilities and therefore provides a further test of methods of representing the thermal conductivity of liquid mixtures based upon the hard-sphere theory of transport in liquids. It is shown that the procedure is capable of representing all of the present experimental data within +5%. A more detailed examination of the results reveals small, but systematic, deviations from universality of the behavior of the thermal conductivity as a function of density implied by the hard-sphere theory, which merit further investigation.

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“…Dymond and coworkers [86,87,88,89,90] subsequently utilized their approach to reproduce experimental viscosities for n-alkanes, branched alkanes and aromatics, typically within a tolerance of better than ±2%. However, their model is extremely sensitive to minor perturbations in molar volume, resulting in significant deviations in the predicted viscosity.…”

Section: Viscosity Model Developmentmentioning

confidence: 99%

An Assessment of Research Needs Related to Improving Primary Cement Isolation of Formations in Deep Offshore Wells

Tapriyal¹,

Enick²,

McHugh³

et al. 2012

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The National Energy Technology Laboratory (NETL) conducts cutting-edge energy research and technology development and analyzes energy systems and international energy issues for the U.S. Department of Energy. The NETL-Regional University Alliance (NETL-RUA) is an applied research collaboration that combines NETL's energy research expertise with the broad capabilities of five nationally recognized, regional universities: Carnegie Mellon University (CMU), The Pennsylvania State University (PSU), the University of Pittsburgh (Pitt), Virginia Tech, and West Virginia University (WVU), and the engineering and construction expertise of an industry partner (URS). The NETL-RUA leverages its expertise with current fossil energy sources to discover and develop sustainable energy systems of the future, introduce new technology, and boost economic development and national security. Cover Illustration:The image provides an inside view of the density cell, which is capable of getting density data at 500°F and 35,000 psi. The left side image shows the bubble point of the gas. The tiny bubbles can be seen at the top center of the cell. The middle image shows the liquid-liquid-gas equilibrium phase exhibiting two liquid phases at the bottom and in the middle sections as well as a gas phase at the top. The right side image shows the solid formation as the pressure is increased.

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The viscosity of liquid toluene at elevated pressures

Cited by 45 publications

References 3 publications

Validation of an accurate vibrating-wire densimeter: Density and viscosity of liquids over wide ranges of temperature and pressure

Validation of an accurate vibrating-wire densimeter: Density and viscosity of liquids over wide ranges of temperature and pressure

Thermal conductivity of liquid mixtures of benzene and 2,2,4-trimethylpentane at pressures up to 350 MPa

An Assessment of Research Needs Related to Improving Primary Cement Isolation of Formations in Deep Offshore Wells

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