Pressure drop in a fluidised bed reactor is __________ that in a similar packed bed reactor.

The pressure drop in a fluidised bed reactor is typically:

✅ Less than that in a similar packed bed reactor.
Explanation:
In a packed bed reactor, the fluid must force its way through a fixed arrangement of particles, which leads to a higher pressure drop due to increased resistance.

In a fluidised bed, the particles are suspended in the fluid, creating a more dynamic and open structure, which offers less resistance to flow once fluidisation starts.

At minimum fluidisation velocity, the pressure drop in a fluidised bed becomes nearly constant and lower compared to a packed bed of the same height.

✅ Correct Answer: A. Less than