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Chemical Reaction Engineering Asynchronous Video Series. Chapter 6, Part 1: Series, Parallel and Complex Liquid Phase Reactions: Selectivity, Mole Balances and A-->B-->C in a Batch Reactor H. Scott Fogler, Ph.D. Multiple Reactions.

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chemical reaction engineering asynchronous video series

Chemical Reaction EngineeringAsynchronous Video Series

Chapter 6, Part 1:

Series, Parallel and Complex Liquid Phase Reactions:

Selectivity, Mole Balances and

A-->B-->C in a Batch Reactor

H. Scott Fogler, Ph.D.

multiple reactions
Multiple Reactions

Use molar flow rates and concentrations; DO NOT use conversion!

Types of Multiple Reactions

  • Series Reactions
  • Parallel Reactions
multiple reactions3
Multiple Reactions

Use molar flow rates and concentrations; DO NOT use conversion!

Types of Multiple Reactions

  • Series Reactions
  • Parallel Reactions
  • Complex Reactions: Series and Parallel
  • Independent
selectivity and yield
Selectivity and Yield

InstantaneousOverall

Selectivity

selectivity and yield5
Selectivity and Yield

InstantaneousOverall

Selectivity

Yield:

selectivity and yield6
Selectivity and Yield

InstantaneousOverall

Selectivity

Yield:

Example: (1) desired product , rD=k1CA2CB

(2) undesired product , rU=k2CACB

selectivity and yield7
Selectivity and Yield

InstantaneousOverall

Selectivity

Yield:

Example: (1) desired product , rD=k1CA2CB

(2) undesired product , rU=k2CACB

Run at high concentration of A. Therefore, use a PFR.

selectivity and yield8
Selectivity and Yield

(1) desired product , rD=k1CA2CB

(2) undesired product , rU=k2CACB

Add a third reaction.

(3)

selectivity and yield9
Selectivity and Yield

(1) desired product , rD=k1CA2CB

(2) undesired product , rU=k2CACB

Add a third reaction.

(3)

then

SD/U1/U2

CA

series reactions24
Series Reactions

, t=0 CA=CA0