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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 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 Use molar flow rates and concentrations; DO NOT use conversion! Types of Multiple Reactions • Series Reactions • Parallel Reactions
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 InstantaneousOverall Selectivity
Selectivity and Yield InstantaneousOverall Selectivity Yield:
Selectivity and Yield InstantaneousOverall Selectivity Yield: Example: (1) desired product , rD=k1CA2CB (2) undesired product , rU=k2CACB
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 Yield (1) desired product , rD=k1CA2CB (2) undesired product , rU=k2CACB Add a third reaction. (3)
Selectivity and Yield (1) desired product , rD=k1CA2CB (2) undesired product , rU=k2CACB Add a third reaction. (3) then SD/U1/U2 CA
Series Reactions , t=0 CA=CA0