CSTR Design Example (Using Damkohler Number)

Organized by textbook: learncheme.com/
Example of how to use the Damkohler number (a dimensionless unit) to examine how changing a single variable can affect overall reactor conditions in a CSTR. Made by faculty at the University of Colorado Boulder, Department of Chemical and Biological Engineering. Check out our Kinetics/Reactor Design playlists: kzbin.info...

[@aneu0anne]

Thank you so much! The explanation is very clear :)

[@johnmathew4133]

how ((cc)2)/(kc)) term come in intial mole balance eqn of cstr.

[@aneu0anne]

Because that's the equation when the reaction is reversible. Products are divided by Kc.

[@Gojo_Satorou274]

SIr I am getting the conversion as 0.611

[@LearnChemE]

Are you starting with the equation 2.91 = X / [(1-X)^2 - (4X^2/64)]? It's a long equation. Check your work. I redid it and got X = 0.55. Good luck.

[@Gojo_Satorou274]

@@LearnChemE Yes Sir rearragning this equation is giving me 1.728X^2 - 5.28X + 2.91 = 0 Solving for X we get X = 0.7215 and X = 2.3341 which is discarded.

[@avijeetsinghjaswal]

Isn't the mass balance wrong for a CSTR. Instead of X/(-ra) it should be {Cao.(1-X)/(-ra)}