1 / 39

Chemical Reaction Engineering Asynchronous Video Series

Chemical Reaction Engineering Asynchronous Video Series. Chapter 2: Conversion and Reactors in Series H. Scott Fogler, Ph.D. Reactor Mole Balance Summary. Conversion. Conversion. Conversion. Batch Reactor Conversion.

Download Presentation

Chemical Reaction Engineering Asynchronous Video Series

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Chemical Reaction EngineeringAsynchronous Video Series Chapter 2: Conversion and Reactors in Series H. Scott Fogler, Ph.D.

  2. Reactor Mole Balance Summary

  3. Conversion

  4. Conversion

  5. Conversion

  6. Batch Reactor Conversion • For example, let’s examine a batch reactor with the following design equation:

  7. Batch Reactor Conversion • For example, let’s examine a batch reactor with the following design equation: • Consider the reaction:

  8. Batch Reactor Conversion • For example, let’s examine a batch reactor with the following design equation: • Consider the reaction:

  9. Batch Reactor Conversion • For example, let’s examine a batch reactor with the following design equation: • Consider the reaction: Differential Form: Integral Form:

  10. CSTR Conversion Algebraic Form: There is no differential or integral form for a CSTR.

  11. PFR Conversion PFR

  12. PFR Conversion PFR

  13. PFR Conversion PFR Differential Form: Integral Form:

  14. Design Equations

  15. Design Equations

  16. Design Equations

  17. V Design Equations

  18. V Design Equations

  19. Example

  20. 0.01 0 Example

  21. 0.01 0 0 Example

  22. 0.01 0 0 50 40 30 20 10 0.6 0.8 0.2 0.4 Example X

  23. Reactor Sizing • Given -rA as a function of conversion, -rA=f(X), one can size any type of reactor.

  24. Reactor Sizing • Given -rA as a function of conversion, -rA=f(X), one can size any type of reactor. • We do this by constructing a Levenspiel plot.

  25. 50 40 30 20 10 0.6 0.8 0.2 0.4 Reactor Sizing • Given -rA as a function of conversion, -rA=f(X), one can size any type of reactor. • We do this by constructing a Levenspiel plot. • Here we plot either as a function of X.

  26. 50 40 30 20 10 0.6 0.8 0.2 0.4 Reactor Sizing • Given -rA as a function of conversion, -rA=f(X), one can size any type of reactor. • We do this by constructing a Levenspiel plot. • Here we plot either as a function of X. • For vs. X, the volume of a CSTR is: XEXIT Equivalent to area of rectangle on a Levenspiel Plot

  27. 50 40 30 20 10 0.6 0.8 0.2 0.4 Reactor Sizing • Given -rA as a function of conversion, -rA=f(X), one can size any type of reactor. • We do this by constructing a Levenspiel plot. • Here we plot either as a function of X. • For vs. X, the volume of a CSTR is: • For vs. X, the volume of a PFR is: XEXIT Equivalent to area of rectangle on a Levenspiel Plot =area = area under the curve

  28. Numerical Evaluation of Integrals • The integral to calculate the PFR volume can be evaluated using Simpson’s One-Third Rule:

  29. Numerical Evaluation of Integrals • The integral to calculate the PFR volume can be evaluated using Simpson’s One-Third Rule (see Appendix A.4 on p. 924):

  30. Reactors In Series

  31. Reactors In Series

  32. Reactors In Series

  33. Reactors in Series • Also consider a number of CSTRs in series:

  34. Reactors in Series • Finally consider a number of CSTRs in series: • We see that we approach the PFR reactor volume for a large number of CSTRs in series: X

  35. Summary

  36. Summary

  37. Summary

  38. Summary

  39. Summary

More Related