Chemical Reaction Engineering
Space time equals the mean residence time

For narrow diameter tubular reactor
When the density of the reaction mixture is constant
For large diameter tubular reactor
For CSTR

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

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

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