Chemical Reaction Engineering
A pollutant P degrades according to first order kinetics. An aqueous stream containing P at 2 kmole/m³ and volumetric flow rate 1m³ /h requires a mixed flow reactor of volume V to bring down the pollutant level to 0.5 kmole/m³ . The inlet concentration of the pollutant is now doubled and the volumetric flow rate is tripled. If the pollutant level is to be brought down to the same level of 0.5 kmole/m³ , the volume of the mixed flow reactor should be increased by a factor of

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Chemical Reaction Engineering
For all positive reaction orders for a particular duty,

Reactor size is independent of the type of flow
Ratio of the volume of the mixed reactor to that of the plug-flow reactor decreases with order
Mixed reactor is always larger than the plug-flow reactor
Density variation during reaction affects design

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