A porous pellet with $Pt$ dispersed in it is used to carry out a catalytic reaction. Following two scenarios are possible.
$Scenario\:1$ : $Pt$ present throughout the pores of the pellet is used for catalyzing the reaction.
$Scenario\:2$ : $Pt$ present only in the immediate vicinity of the external surface of the pellet is used for catalyzing the reaction.
At a large value of Thiele modulus, which one of the following statements is $TRUE$?
- Since the reaction rate is much greater than the diffusion rate, $Scenario\:1$ occurs
- Since the reaction rate is much greater than the diffusion rate, $Scenario\:2$ occurs
- Since the reaction rate is much lower than the diffusion rate, $Scenario\:1$ occurs
- Since the reaction rate is much lower than the diffusion rate, $Scenario\:2$ occurs