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The value of the Dispersion coefficient for plug flow is ____

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The value of the Dispersion coefficient for plug flow is ____

(a) 1

(b) 0

(c) ∞

(d) 2

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

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Right choice is (b) 0

For explanation I would say: There is no axial mixing in a PFR. Hence, the dispersion of the fluid in the longitudinal direction is assumed to be zero.

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