Phase Behavior and ThermodynamicsGas Properties

Kay Mixing Rule Gas Pseudo-Critical Properties Calculator

T_{pc}=\sum_i y_iT_{ci}

Enter the required inputs, confirm the units, and run the calculator to solve T_pc. Review the formula source and assumptions before using the result in engineering work.

Tabular solver

Inputs

Defaults provide a quick field-unit example for the equation.

15 variables

y_1Mole Fraction of Component 1, Default MethaneT_c1Critical Temperature of Component 1, Default MethaneP_c1Critical Pressure of Component 1, Default Methaney_2Mole Fraction of Component 2, Default EthaneT_c2Critical Temperature of Component 2, Default EthaneP_c2Critical Pressure of Component 2, Default Ethaney_3Mole Fraction of Component 3, Default PropaneT_c3Critical Temperature of Component 3, Default PropaneP_c3Critical Pressure of Component 3, Default Propaney_4Mole Fraction of Component 4, Default NitrogenT_c4Critical Temperature of Component 4, Default NitrogenP_c4Critical Pressure of Component 4, Default Nitrogeny_5Mole Fraction of Component 5, Default Carbon DioxideT_c5Critical Temperature of Component 5, Default Carbon DioxideP_c5Critical Pressure of Component 5, Default Carbon Dioxide

Calculation runs locally with the shared TypeScript engine.

Formula reference

Kay Mixing Rule Gas Pseudo-Critical Properties calculates mixture pseudo-critical temperature for gas properties workflows in phase behavior and thermodynamics.

View formula, units, and source

Assumptions

Input values are representative for the well, reservoir, fluid, or equipment case being evaluated.
The declared units match the field-unit constants used in the formula.
The cited formula applies to the selected petroleum engineering workflow.

Common mistakes

Mixing unit systems without converting the inputs.
Using default example values as field recommendations.
Applying the formula outside the source assumptions.