Yield and Selectivity for Series-Reaction Network in a CSTR and a PFR

Consider a series-reaction network composed of two first-order reactions: A B C. It is assumed that B is the desired product, which yields and selectivity , which are plotted versus the conversion for various values of the ratio in this Demonstration. Yield and selectivity are plotted in red for the PFR (plug flow reactor) and in green for the CSTR (continuous stirred-tank reactor). Yield and selectivity will have low values if one operates at high conversions. Thus there is a trade-off between conversion of reactant A and selectivity for component B. For high values of , the selectivity drops sharply with conversion. On the other hand, when is small, there is a large range of conversion values for which the selectivity is still high enough, especially for the PFR reactor. It is clear from the results that a recycling of some unreacted reactants will be necessary.


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


R. W. Missen, C. A. Mims and B. A. Saville, Introduction to Chemical Reaction Engineering and Kinetics, New York: Wiley, 1999.
    • 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+