Computation of Tie Lines for Ternary Mixtures

Initializing live version
Download to Desktop

Requires a Wolfram Notebook System

Interact on desktop, mobile and cloud with the free Wolfram Player or other Wolfram Language products.

Consider a ternary mixture of hexane, heptane, and methanol. A temperature of 32.85 °C is assumed. This liquid-liquid equilibrium diagram is classified as type II. The Demonstration computes the tie line originating from a user-specified position on the extract curve (i.e., known values of for are assumed). In effect, one has to find the steady-state solution of the following system of ODEs:


for , where is the mole fraction of component in phase (hexane-rich or hexane-lean phases) and is the activity coefficient of component in phase predicted using the non-random two liquid (NRTL) model.


Contributed by: Housam Binous and Ahmed Bellagi (March 2011)
Open content licensed under CC BY-NC-SA



Feedback (field required)
Email (field required) Name
Occupation Organization
Note: Your message & contact information may be shared with the author of any specific Demonstration for which you give feedback.