飽和液体物性定数の一般的推算法

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タイトル別名
  • General Prediction of Physical Properties of Saturated Liquids

説明

On the basis of the well-known empirical relations between physical properties, such as vapor pressure, viscosity, surface tension, latent heat of vaporization and density of the saturated liquids, and temperature, the following general correlations were obtained and simple methods were presented for the general prediction of the properties with engineering accuracies.<BR>(1) The fraction of a property based on the difference of the values (or its logarithmic values) at the normal boiling point and the critical point is a general function of the similar fraction of absolute temperature (or its reciprocal), as generally shown by Eq. 1.11.<BR>(2) Selecting the units of the properties so as to vanish at the critical point or the boiling point in the fractional equations, the general correlations of the certain functions (τ, s) of the properties with T/Tc or T/Tb were obtained. If the critical temperature, Tc, or the normal boiling temperature, Tb, is known and a value of the property at some one temperature is available, values at any temperature can easily be predicted using a chart (Fig. 1·7), as shown in numerous examples.<BR>(3) Combining the τ function of any property with that of density, the reduced equation of state for saturated liquids (Eq. 2·5) and the simple generalized correlations of the properties with density in a reduced form with respect to normal boiling point (Fig. 2·3-2·6) were obtained. These correlations may present simple methods for general prediction of the properties in such cases as when the critical temperatures are not available in mixtures or in high-molecular liquids, as shown in numerous examples. The data required are values of the property at a certain temperature and densities at that temperature and at the temperatures concerned.<BR>Some extensive conclusions, of scientific and engineering interest, are suggested.

収録刊行物

  • 化学工学

    化学工学 18 (6), 266-278, 1954

    公益社団法人 化学工学会

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