Feed Stages in a Distillation Column

The flow rates to and from a feed stage of a distillation column are proportional to the thickness of the arrows in the figure. Liquid (blue) flows down the column and vapor (green) flows up. Use the slider to change the quality of the feed stream. A quality of 0 corresponds to a vapor feed () at its dew point and a quality of 1 corresponds to a liquid feed () at its bubble point; the state of the feed is indicated just below the feed arrow. Depending on its quality, the feed can go into the liquid flow or vapor flow, or it can be distributed between the two. A superheated vapor goes into the vapor phase and also causes some of the liquid flow in the column to vaporize. A subcooled liquid feed goes into the liquid phase and also causes some of the vapor flow in the column to condense.


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


[1] J. D. Seader, E. J. Henley and D. K. Roper, Separation Process Principles: Chemical and Biochemical Operations, 3rd ed., Hoboken, NJ: John Wiley & Sons, 2011 p. 265.
    • 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.

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 © 2018 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+