5671Chemical EngineeringMedium
A first order reaction A → B occurs in an isothermal porous catalyst pellet of spherical shape. If the concentration of A at the centre of the pellet is much less than at the external surface, the process is limited by________?
ANone of the above
BReaction
CExternal mass transfer
DDiffusion within the pellet
Correct answer
D. Diffusion within the pellet
Explanation
The correct answer is Diffusion within the pellet.