Chemical Reaction Engineering
The 'E' curve for a non-ideal reactor defines the fraction of fluid having age between t and t + dt

At the outlet
At the inlet
Averaged over the inlet and outlet
In the reactor

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Chemical Reaction Engineering
A batch reactor is

Suitable for gas-phase reactions on commercial scale
Most suitable for very large production rate
Suitable for liquid phase reactions involving small production rate
Least expensive to operate for a given rate

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