Question

Space time as a function of molar feed rate and initial concentration is given as ____

(a) \(\frac{VC_{A0}}{F_{A0}} \)

(b) \(\frac{C_{A0}}{VF_{A0}} \)

(c) \(\frac{VF_{A0}}{C_{A0}} \)

(d) \(\frac{C_{A0}}{F_{A0}} \)

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This is a very interesting question from Space Time and Space Velocity topic in division Ideal Reactors for a Single Reaction, Conversion and Reactor Sizing of Chemical Reaction Engineering

Answer 1

Right choice is (a) \(\frac{VC_{A0}}{F_{A0}} \)

Easiest explanation: Space time is the ratio of the product of reactor volume and initial concentration to the feed rate. \(\frac{VC_{A0}}{F_{A0}} \)   has the same unit as that of space time.