Abstract:T HE VISCOSITY of the vapors of many pure organic compounds and simple binary mixtures has been measured and reported in the literature. Among these, there have, however, been few studies to determine the viscosity of binary mixtures of so-called polar molecules.The experimental values for the viscosity of mixtures of superheated aliphatic alcohol vapors are reported here for several reasons.
“…Therefore, these three data sets should be used for the zero-density viscosity correlation. 5 Deviations Δ = 100(η lit − η exp,fit )/η exp,fit of viscosity data of the literature from the present results obtained by a fit of eq 4 to the calculated values at atmospheric pressure: ○, Titani; ▵, Silgardo and Storrow; □, Golubev and Petrov; , ▴, Reid and Belenyessy; ▪, Golubev and Kovarskaya; ◇, Meerlender and Aziz; ·, present paper. 6 Deviations Δ = 100(η lit − η exp, fit )/η exp, fit of viscosity data of the literature from the present results obtained by a fit of eq 4 to the values in the limit of zero density: ▴, Craven and Lambert; □, Golubev and Likhachev; ○, Vogel et al; ·, present paper.…”
Section: Analysis Including Literature Datamentioning
confidence: 74%
“…vapor 22 0 5.0 CAP absolute Silgardo and Storrow 26 338−373 ≈0.1 2 0 3.0 RB relative Craven and Lambert 27 308−351 0.001−0.003 4 0 3.0 OSP relative Golubev and Petrov , 423−543 ≈0.1 5 5 1.0 CAP absolute Golubev 373−513 sat. vapor 17 0 1.0 CAP absolute Reid and Belenyessy 423 ≈0.1 1 0 1.5 CAP relative Pal and Barua 303−477 <0.01 5 0 3.0 OSD relative Golubev and Kovarskaya 373−573 ≈0.1 3 0 1.0 CAP relative Meerlender and Aziz 343−353 ≈ 0.1 2 0 1.0 CAP relative Golubev and Likhachev 385−516 0.1−4.4 d 122 17 1.0 CAP absolute Vogel et al 301−615 isochores 60 10 0.3 OSD relative Present paper 298−603 isochores 165 18 0.3 OSD relative a Number of isotherms.…”
Section: Theorymentioning
confidence: 99%
“…First, the data from the literature were grouped into data sets at about atmospheric pressure (Titani, Silgardo and Storrow, Golubev and Petrov, , Reid and Belenyessy, Golubev and Kovarskaya, Meerlender and Aziz 34 ) and data sets near or extrapolated to zero density (Craven and Lambert, Pal and Barua, Golubev and Likhachev, Vogel et al). In this connection, it is to note that the measurements by Golubev and Likhachev 35 were performed up to higher pressures starting with atmospheric pressure.…”
Section: Analysis Including Literature Datamentioning
The viscosity coefficient of methanol vapor was measured at low densities by means of an all-quartz oscillating-disk viscometer of high precision. The relative measurements were performed along 10 isochores at densities
from (0.004 to 0.050) mol·dm-3 in the temperature range between (298 and 603) K. The uncertainty is estimated
to be ± 0.2 % at room temperature, increasing up to ± 0.3 % at higher temperatures. Isothermal values recalculated
from the original experimental data were evaluated with a first-order expansion for the viscosity in terms of
density. A reasonable agreement with experimental values from the literature was found for those of Golubev
and Likhachev (up to 1 % higher) measured with a capillary viscometer in an extended temperature range up to
high pressures. The new results, some older ones obtained in our laboratory, and those of Golubev and Likhachev
are used to model the viscosity of methanol vapor at moderately low densities. Whereas an individual correlation
according to the extended theorem of corresponding states was necessary to represent the zero-density viscosity
coefficient within its uncertainty, the Rainwater−Friend theory proved to be suitable for the description of the
second viscosity virial coefficient. In addition, viscosity values of the saturated vapor were determined at low
temperatures (299 to 339 K). They are in reasonable good consistency with values of Golubev determined at
higher temperatures (373 to 513 K).
“…Therefore, these three data sets should be used for the zero-density viscosity correlation. 5 Deviations Δ = 100(η lit − η exp,fit )/η exp,fit of viscosity data of the literature from the present results obtained by a fit of eq 4 to the calculated values at atmospheric pressure: ○, Titani; ▵, Silgardo and Storrow; □, Golubev and Petrov; , ▴, Reid and Belenyessy; ▪, Golubev and Kovarskaya; ◇, Meerlender and Aziz; ·, present paper. 6 Deviations Δ = 100(η lit − η exp, fit )/η exp, fit of viscosity data of the literature from the present results obtained by a fit of eq 4 to the values in the limit of zero density: ▴, Craven and Lambert; □, Golubev and Likhachev; ○, Vogel et al; ·, present paper.…”
Section: Analysis Including Literature Datamentioning
confidence: 74%
“…vapor 22 0 5.0 CAP absolute Silgardo and Storrow 26 338−373 ≈0.1 2 0 3.0 RB relative Craven and Lambert 27 308−351 0.001−0.003 4 0 3.0 OSP relative Golubev and Petrov , 423−543 ≈0.1 5 5 1.0 CAP absolute Golubev 373−513 sat. vapor 17 0 1.0 CAP absolute Reid and Belenyessy 423 ≈0.1 1 0 1.5 CAP relative Pal and Barua 303−477 <0.01 5 0 3.0 OSD relative Golubev and Kovarskaya 373−573 ≈0.1 3 0 1.0 CAP relative Meerlender and Aziz 343−353 ≈ 0.1 2 0 1.0 CAP relative Golubev and Likhachev 385−516 0.1−4.4 d 122 17 1.0 CAP absolute Vogel et al 301−615 isochores 60 10 0.3 OSD relative Present paper 298−603 isochores 165 18 0.3 OSD relative a Number of isotherms.…”
Section: Theorymentioning
confidence: 99%
“…First, the data from the literature were grouped into data sets at about atmospheric pressure (Titani, Silgardo and Storrow, Golubev and Petrov, , Reid and Belenyessy, Golubev and Kovarskaya, Meerlender and Aziz 34 ) and data sets near or extrapolated to zero density (Craven and Lambert, Pal and Barua, Golubev and Likhachev, Vogel et al). In this connection, it is to note that the measurements by Golubev and Likhachev 35 were performed up to higher pressures starting with atmospheric pressure.…”
Section: Analysis Including Literature Datamentioning
The viscosity coefficient of methanol vapor was measured at low densities by means of an all-quartz oscillating-disk viscometer of high precision. The relative measurements were performed along 10 isochores at densities
from (0.004 to 0.050) mol·dm-3 in the temperature range between (298 and 603) K. The uncertainty is estimated
to be ± 0.2 % at room temperature, increasing up to ± 0.3 % at higher temperatures. Isothermal values recalculated
from the original experimental data were evaluated with a first-order expansion for the viscosity in terms of
density. A reasonable agreement with experimental values from the literature was found for those of Golubev
and Likhachev (up to 1 % higher) measured with a capillary viscometer in an extended temperature range up to
high pressures. The new results, some older ones obtained in our laboratory, and those of Golubev and Likhachev
are used to model the viscosity of methanol vapor at moderately low densities. Whereas an individual correlation
according to the extended theorem of corresponding states was necessary to represent the zero-density viscosity
coefficient within its uncertainty, the Rainwater−Friend theory proved to be suitable for the description of the
second viscosity virial coefficient. In addition, viscosity values of the saturated vapor were determined at low
temperatures (299 to 339 K). They are in reasonable good consistency with values of Golubev determined at
higher temperatures (373 to 513 K).
“…These equations have been tested with great success against experi mental data for a large number of non-polar mixtures [6] and are usually not in error by more than 2 per cent. Later studies [9] showed that this scheme can be applied with equal success to polar gases. The only cases in which significant disagreement was found were when Mj» M; and rjj» rj;.…”
In the previous chapter, a brief description of the kinetic theory was presented. We now consider appropriate applications of the theory to the prediction of transport properties of pure fluids and mixtures in the gaseous and liquid states. The methods chosen are those that have a reasonable connection with the theory and in which a transport property X is written:The critical enhancement AX C will not be considered further here. The dilute-gas term X 0 will be discussed first. Then, the estimation of the excess transport properties AX for compressed gases by the method of Thodos will be examined while, for liquids, the scheme proposed by Dymond and Assael will be presented. Finally, for the estimation of the viscosity and thermal conductivity of non-polar mixtures, the corresponding-states scheme of Ely and Hanley will be outlined.In Section 10.6, numerical examples based on these methods will be given.
Dilute Gases and MixturesFor a dilute gas, the viscosity is given from Eq.(9.30) as f is generally taken as unity. This expression, although strictly applicable only to a monatomic gas, is used in practice as a correlating tool for many pure gases including those with polyatomic molecules. The reduced collision integral Q* = Q/(n
“…For mixtures of polar vapors (binary mixtures of methanol, ethanol, and propanol with butanol) at 150°C. Reid and Belenyessy (82) found that the interpolation method of Wilke fitted the data.…”
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