Elements of
Chemical Reaction Engineering
6th Edition



Home



Essentials of
Chemical Reaction Engineering
Second Edition

  Select  Chapter  >>     TOC     Preface     1     2     3     4     5     6     7     8     9     10     11     12     13     14     15     16     17     18     Appendices  
›

By Chapter Hide

  • Objectives
  • Living Example Problems
  • Extra Help
  • - Summary Notes
  • - LearnChemE Screencasts
  • - FAQs
  • - Interactive Computer Modules
  • Additional Material
  • Self Test
  • i>Clicker Questions
  • Professional Reference Shelf

By Concept Hide

  • Interactive Modules
  • -Web Modules
  • -Interactive Computer Games
  • Living Example Problems

U of M Hide

  • Asynchronous Learning
  • ChE 344
  • ChE 528

Chapter 12: Steady-State Nonisothermal Reactor Design: Flow Reactors with Heat Exchange

Derivation

The governing equations for a PFR/PBR:

Mole Balance:

Energy Balance:

Solutions to these equations give the following typical profiles (in the absence of runaway):

 

 

Figure 5. Temperature and concentration profiles.

 

At the maximum temperature in the reactor, Tm

then

 

For a first order reaction: , then and we can solve for CAm to obtain

where Tm is the maximum temperature in the reactor and CAm is the corresponding concentration of A at that maximum temperature. For this reactor .

Back to Runaway Reactions in PFRs