High-Pressure Viscosity and Density Behavior of Ternary Mixtures: 1Methylnaphthalene+n-Tridecane+2,2,4,4,6,8,8-Heptamethylnonane (original) (raw)
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Viscosity and density of the ternary mixture heptane+methylcyclohexane+1-methylnaphthalene
International Journal of Thermophysics, 1997
The dynamic viscosity q and the density p of the ternary mixture heptane (mole fraction .x~) + methylcyclohexane (mole fraction .v2) + I-methylnaphthalene (mole fraction .v3) were measured as a function of temperature T (303.15. 323.15, and 343.15 K) and pressure P (~< 100 MPa). The experimental results correspond to 378 values of q and p. With reference to the 54 values previously published on pure substances and 378 values for the three associated binaries, the system is globally described by 810 experimental values for various values of P, T, and composition.
International Journal of Thermophysics, 2001
The dynamic viscosity η of the binary mixture 1-methylnaphthalene+2,2,4,4,6,8,8-heptamethylnonane was measured in the temperature range 293.15 to 353.15 K (in progressive 10 K steps) at pressures of 0.1, 20, 40, 60, 80, and 100 MPa. The composition of the system is described by nine molar fractions (0 to 1 in 0.125 progressive steps). The density ρ was measured at pressures from 0.1 to
Journal of Solution Chemistry, 2017
The density and viscosity of a ternary 1-hexene(1) ? 1-octene(2) ?1-decene(3) mixture (w 1 ¼ w 2 ¼ w 3 ¼ 0:333 weight fractions or x 1 ¼ 0:4257,x 2 ¼ 0:3190, x 3 ¼ 0:2553 mole fractions of 1-hexene, 1-octene, and 1-decene, respectively) have been simultaneously measured over the temperature range from (298 to 471) K and at pressures up to 196 MPa using a combined method of hydrostatic weighing and falling-body techniques, respectively. The combined expanded uncertainties of the density, pressure, temperature, concentration, and viscosity measurements at the 95% confidence level with a coverage factor of k = 2 are estimated to be (0.15 to 0.30)%, 0.05%, 0.02 K, 0.005 mol%, and (1.5 to 2.0)%, respectively. The measured densities and viscosities were used to calculate the excess molar volumes and viscosity differences. The excess molar properties (G E m ; H E m ; S E m and C E pm) and their pressure derivatives as a function of temperature and pressure have been calculated using the derived excess molar volumes. The measured viscosities were used to develop a theoretically based viscosity correlation model (Arrhenius-Andrade type equation) for the mixture.
Journal of Chemical & Engineering Data, 2009
Liquid viscosities of eight mixtures for the ternary system benzene + cyclohexane + n-tetradecane were experimentally measured using a rolling-ball viscometer from (313.2 to 393.2) K and at pressures up to 60 MPa. We performed the modeling of the measured mixture viscosity data (256 points) by applying the Grunberg-Nissan (GN) and Katti-Chaudhri (KC) correlations and a liquid viscosity model based on Eyring's theory coupled to a cubic equation of state (ET-EoS) by using a single temperature-independent binary interaction parameter for the benzene + n-tetradecane, benzene + cyclohexane, and cyclohexane + n-tetradecane systems. Results of the modeling process yielded an average absolute deviation of (4.9, 5.3, and 6.7) % for the GN, KC, and ET-EoS viscosity models, respectively, which show that the GN model is superior to the KC and ET-EoS models in predicting the whole viscosity-temperature-pressure-composition surface of the ternary system studied.
Fluid Phase Equilibria, 2007
In this work, kinematic viscosities of benzene, n-tetradecane, and of the mixture benzene + n-tetradecane at four different compositions were measured using a rolling-ball viscometer from 313.2 to 393.2 K and pressures up to 60 MPa. Kinematic viscosities were converted to dynamic viscosities through the use of a density Tait-like equation for pure components and a single density mixing rule for the mixtures. A comparison between our measured viscosities and those reported by other authors for benzene and n-tetradecane was established with the correlation given by Assael et al. [M.J. Assael, J.H. Dymond, M. Papadaki, P.M. Patterson, Correlation and prediction of dense fluid transport coefficients. I. n-alkanes, Int. J. Thermophys. 13 (1992) 269-281].
Journal of Chemical & Engineering Data, 2009
The densities of binary mixtures of n-hexadecane and cyclohexane at high pressures were measured in the range of (6.895 to 62.053) MPa at six different temperatures varying from (318.15 to 413.15) K and for eight compositions. The measurements were made by a high-pressure Anton Paar DMA 512 P densimeter integrated with the Ruska 2370 mercury Free PVT System. The densimeter was calibrated using analytical grade toluene, cyclohexane, and n-heptane as calibration fluids. The experimental error of density measurements is estimated as 0.5 kg‚m-3. The measured densities at 348.15 K agree well with the available literature values at different pressures. The excess volumes, thermal expansion, and isothermal compressibility coefficients were obtained from measured densities. All data were correlated successfully with a modified Peng-Robinson equation of state.
The Journal of Chemical Thermodynamics, 2006
Density and viscosity measurements are reported for {x 1 n-heptane + (1 À x 1 )n-octane} mixtures at x 1 = (0.2808, 0.5427, 0.7906). The measurements of density and viscosity were made with a constant-volume piezometer immersed in a precision liquid thermostat and a capillary flow technique, respectively. Measurements were made at pressures up to 10 MPa. The range of temperature was (293 to 557) K for the density measurements and (298 to 473) K for the viscosity measurements. The total uncertainty of density, viscosity, pressure, temperature, and composition measurements was estimated to be less than 0.06%, 1.6%, 0.05%, 15 mK, and 0.02%, respectively. The effect of temperature, pressure, and concentration on density and viscosity of the binary {x 1 n-heptane + (1 À x 1 )n-octane} mixtures was studied. The measured values of density and viscosity for the pure components and mixtures were compared with those generated by reference equations and prediction techniques for the mixtures. The excess molar volumes V E m and the viscosity deviations Dg were derived using the measured values of density and viscosity for the mixtures and pure components. The viscosity data have been interpreted in terms of the Grunberg-Nissan equation for binary mixtures. The temperature dependence of the Grunberg-Nissan constant was studied using the present viscosity data. The molar excess Gibbs energy of activation for flow DE a was also calculated from our experimental viscosity data for the (n-heptane + n-octane) mixtures.
Density and Viscosity of Mixtures of n-Hexane and 1-Hexanol from 303 to 423 K up to 50 MPa
International Journal of Thermophysics, 2002
ABSTRACT Experimental results for the density and viscosity of n-hexane+1-hexanol mixtures are reported at temperatures from 303 to 423 K and pressures up to 50 MPa. The binary mixture was studied at three compositions, and measurements on pure 1-hexanol are also reported. The two properties were measured simultaneously using a single vibrating-wire sensor. The present results for density have a precision of ±0.07% and an estimated uncertainty of ±0.3%. The viscosity measurements have a precision of ±1% and an estimated uncertainty of ±4%. Representations of the density and viscosity of the mixture as a function of temperature and pressure are proposed using correlation schemes.
Measurements of the viscosity of n-heptane + n-undecane mixtures at pressures up to 75 MPa
International Journal of Thermophysics, 1991
New absolute measurements of the viscosity of binary mixtures of n-heptane and n-undecane are presented. The measurements, performed in a vibrating-wire instrument, cover the temperature range 295-335 K and pressures up to 75 MPa. The concentrations studied were 40 and 70 %, by weight, of n-heptane. The overall uncertainty in the reported viscosity data is estimated to be _+0.5 %. A recently extended semiempirical scheme for the prediction of the thermal conductivity of mixtures from the pure components is used to predict successfully both the thermal conductivity and the viscosity of these mixtures, as a function of composition, temperature, and pressure.