Elements of
Chemical Reaction Engineering
6th Edition



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Essentials of
Chemical Reaction Engineering
Second Edition

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Chapter 1: Mole Balances

 

Batch Reactor Times

Calculate the time to reduce the number of moles by a factor of 10 () in a batch reactor for the above reaction with

-rA = kCA,  when k = 0.046 min-1

Hint 1: Mole Balance

Hint 2: Rate Law

Full Solution

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hint 1

Well mixed batch reactor

In - Out + Generation = Accumulation

Back to Problem

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hint 2

Boundary Conditions: t = 0, NA = NAo and t = t, NA = NA

Puzzle 5-d solved

Back to Problem

 

 

 

 

 

 

 

 

Calculate the time to reduce the number of moles by a factor of 10 in a batch reactor for the reaction with

-rA = kCA,  when k = 0.046 min-1

Solution

Mole balance:

In - Out + Generation = Accumulation

Rate Law:

Boundary Conditions: t = 0, NA = NAo and t = t, NA = NA

 

Solve:

Therefore, t = 50 minutes

Back to Chapter 1



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