9867

Azeotropes of Binary Mixtures Containing Ethanol

When a liquid mixture boils at a given temperature and pressure , the composition of vapor is typically different from the liquid composition ., but this is not always the case. With some mixtures it is possible to have a boiling condition such that the composition of the vapor leaving is the same as the composition of the boiling liquid: . This boiling mixture is called an azeotrope. Azeotropes (also called constant-boiling mixtures) are classified as either minimum boiling (positive) azeotropes or maximum boiling (negative) azeotropes. In this Demonstration, the azeotropes of binary mixtures containing ethanol are computed. You can select the second species for the binary mixture from the pull-down menu and use a slider to specify the system pressure . All the azeotropes computed for the ethanol mixtures are minimum boiling azeotropes.
We use a Wilson equation to calculate the liquid activity coefficients and the Antoine equation to determine the saturation vapor pressures of the pure components . The gas mixture is assumed to be an ideal gas mixture. The azeotrope condition at a specified satifies the equations:
In the plot, the red curve is the first equation and the blue curve is the second equation. The green dot denotes the temperature and ethanol composition at the azeotrope. Since the red curve is always concave up we obtain minimum boiling azeotrope. Clicking the "azeotrope parameters" button in the pane gives a summary of the azeotrope conditions for the selected binary mixture. Parameters for the Antoine equation and the Wilson model were taken from Aspen HYSYS thermodynamics package.

SNAPSHOTS

  • [Snapshot]
  • [Snapshot]
  • [Snapshot]
  • [Snapshot]
  • [Snapshot]

DETAILS

S. I. Sandler, Chemical, Biochemical and Engineering Thermodynamics, 4th ed., New Work: John Wiley & Sons, 2006.
    • Share:

Embed Interactive Demonstration New!

Just copy and paste this snippet of JavaScript code into your website or blog to put the live Demonstration on your site. More details »

Files require Wolfram CDF Player or Mathematica.









 
RELATED RESOURCES
Mathematica »
The #1 tool for creating Demonstrations
and anything technical.
Wolfram|Alpha »
Explore anything with the first
computational knowledge engine.
MathWorld »
The web's most extensive
mathematics resource.
Course Assistant Apps »
An app for every course—
right in the palm of your hand.
Wolfram Blog »
Read our views on math,
science, and technology.
Computable Document Format »
The format that makes Demonstrations
(and any information) easy to share and
interact with.
STEM Initiative »
Programs & resources for
educators, schools & students.
Computerbasedmath.org »
Join the initiative for modernizing
math education.
Step-by-step Solutions »
Walk through homework problems one step at a time, with hints to help along the way.
Wolfram Problem Generator »
Unlimited random practice problems and answers with built-in Step-by-step solutions. Practice online or make a printable study sheet.
Wolfram Language »
Knowledge-based programming for everyone.
Powered by Wolfram Mathematica © 2014 Wolfram Demonstrations Project & Contributors  |  Terms of Use  |  Privacy Policy  |  RSS Give us your feedback
Note: To run this Demonstration you need Mathematica 7+ or the free Mathematica Player 7EX
Download or upgrade to Mathematica Player 7EX
I already have Mathematica Player or Mathematica 7+