CheCalc

Chemical engineering calculations to assist process, plant operation and maintenance engineers.

Binary VLE

Binary Vapor Liquid Equilibrium (VLE) calculation plots Px-y, Tx-y diagram based on Wilson, NRTL and UNIQUAC acitivity coefficient model.
Data
Antoine Equation
ln(Psat.(mmHg)) = A - B/(T(°K)+C)
 (1)(2)
Name
A
B
C
Binary Interaction Parameters
Data
Liquid Molar Volume

Modified Rackett equation is used to estimate liquid molar volume.

V = (RTc/Pc)ZRA [1 + (1-Tr)^(2/7)]

If value of ZRA is not available.

ZRA = 0.29056 - 0.08775ω
 (1)(2)
Tc (°K)
Pc (Bar A)
ω
ZRA
Table
Plot
Bar A

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