For all positive reaction orders for a particular duty ?
Correct answer: D. Mixed reactor is always larger than the plug-flow reactor
- A. Density variation during reaction affects design
- B. Ratio of the volume of the mixed reactor to that of the plug-flow reactor decreases with order
- C. Reactor size is independent of the type of flow
- D. Mixed reactor is always larger than the plug-flow reactor
Explanation
For a positive reaction order, the rate generally decreases as reactants are consumed, so a CSTR operates everywhere at the low exit concentration and requires more volume than a PFR. The PFR benefits from its higher reactant concentration near the inlet.
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