Question

The range of dispersion number for PFR is ____

(a) \(\frac{D}{uL}\) < 0.1

(b) \(\frac{D}{uL}\) < 0.01

(c) \(\frac{D}{uL}\) > 1

(d) \(\frac{D}{uL}\) > 10

The question was asked during a job interview.

This question is from Non Ideal Reactors in section Compartment Models, Models for Non Ideal Reactors of Chemical Reaction Engineering

Answer 1

The correct choice is (b) \(\frac{D}{uL}\) < 0.01

The best explanation: For PFR, \(\frac{D}{uL}\) < 0.01. Due to negligible dispersion in PFR, \(\frac{D}{uL}\) nearly approaches 0.