Gas Absorption with a Rapid Chemical Reaction

A gas species, , is absorbed by a solvent, , containing a solute, . The gas-liquid interface is at . Assume that the liquid phase concentration of at is equal to 1 gmol/liter. The concentration of species in the solvent at is chosen to be equal to 4 gmol/liter. An instantaneous irreversible chemical reaction takes place between and (). The species , , and are present in low concentrations and Fick's second law applies. The diffusivities of species and in are taken to be and , respectively. Because the chemical reaction between and is considered as instantaneous, there is an interface parallel to the plane where neither nor is present. The position of this interface increases with time as is used up by the chemical reaction. This Demonstration displays the position of this interface and the concentration of species and (shown in red and blue, respectively). The computations of the interface position and the species concentrations are based on an analytical solution derived by Bird et al. (see reference below for details).


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


R. B. Bird, W. E. Stewart and E. N. Lightfoot, Transport Phenomena, New York: Wiley, 1960.
    • 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 © 2017 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+