Pinch Composition versus Reflux Ratio for a Benzene-Ethylenediamine Mixture at 1 atm

Requires a Wolfram Notebook System

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

This Demonstration plots the bifurcation diagram (pinch composition versus reflux ratio) for a mixture of benzene and ethylenediamine at 1 atm. The tangent pinch is shown as a blue dot in the diagram.

[more]

For this particular binary mixture, the vapor-liquid equilibrium (VLE) relation is as follows:

, where and .

The bifurcation diagram is obtained; this is the implicit function relating the reflux ratio and the pinch point location:

, where is the reflux ratio and the distillate composition.

The tangent pinch obeys the following conditions: and .

As decreases, the curve loses its distinctive S-shape. The critical point where this transition occurs is verified by the following relations: , and .

[less]

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


Snapshots


Details

For more information, see:

M. F. Doherty and M. F. Malone, Conceptual Design of Distillation Systems, Boston: McGraw-Hill, 2001.



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.
Send