Langmuir Isotherms for a Binary Mixture

Langmuir isotherms are generated for each component in a binary gas-phase mixture of and . You can vary the heats of adsorption of each component, the temperature, and the ratio of partial pressures. The molecules compete for adsorption sites, and this is taken into account in the form of the Langmuir isotherm; it is assumed that the mixture is ideal. You can vary the relative number of sites per molecule to account for larger molecules occupying more surface area than smaller molecules. The Langmuir isotherm for molecule has the form
, where , , and .


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


= adsorption equilibrium constant for ()
= adsorption equilibrium constant for ()
= pre-exponential factor ()
= heat of adsorption of ()
= heat of adsorption of ()
= ideal gas constant ()
= temperature ()
= coverage of
= coverage of
= pressure (bar)
= ratio of partial pressure of to partial pressure of ,
= saturation coverage of to
    • 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 © 2016 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+