The junction point of Vapour Liquid Equilibrium (VLE) area on PT diagram of Fluid Mixture (see Fig. 1).
It is characterized by pseudo-critical temperature LaTeX Math Inline |
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and pseudo-critical pressure LaTeX Math Inline |
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.
The simplest estimate (also called Linear Blending Rule) of Pseudo-Critical Point LaTeX Math Inline |
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is the mole fraction weighted average of the critical temperature LaTeX Math Inline |
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and critical pressure LaTeX Math Inline |
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of fluid components (which are pure substances) :
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T_{pc} = \sum_i x_i \, T_{c,i} |
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p_{pc} = \sum_i x_i \, p_{c,i} |
where
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There are other no-linear methods to blend the components to estimate the Pseudo-Critical Point but many engineering applications use
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and
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as the seed and then fit the values to match lab test data.
In case the fluid composition is not known one can use empirical Pseudo-Critical Point Correlations to assess the Pseudo-Critical Point.
See also
Natural Science / Physics / Thermodynamics / Thermodynamic system
[ Fluid Mixture ]
[ Pseudo-Critical Point (Tpc, ppc) ][ Pseudo-Critical Temperature (Tpc) ][ Pseudo-Critical Pressure (Ppc)][ Pseudo-Critical Point Correlations @model ]
[ Critical Point (Tc, pc) ][ Сritical Temperature (Tc) ][ Critical Pressure (pc) ]