Question

In the dilute phase reacting system, reacting gases carry suspended catalyst through tubes of a vertical heat exchanger with velocity of?

(a) 3 to 12 m/s

(b) 12 to 24 m/s

(c) 1 to 3 m/s

(d) 0.1 to 10 m/s

This question was posed to me during an online interview.

This is a very interesting question from Synthesis Reactions-2 topic in section Particles and Fluidization of Fluidization Engineering

Answer 1

The correct option is (a) 3 to 12 m/s

To explain: This range of velocity provides relevant driving force for smooth circulation of powdered catalyst.