Question

The activity of a catalyst pellet is defined as the ratio of ___

(a) Rate of adsorption of reactants to the catalyst surface to the rate at which the catalytic pellet converts the reactant

(b) Rate at which the catalytic pellet converts the reactant to the rate of adsorption of reactants to the catalyst surface

(c) Rate at which the catalytic pellet converts the reactant to the rate of reaction with a fresh pellet

(d) The rate of reaction with a fresh pellet to the rate at which the catalytic pellet converts the reactant

This question was addressed to me by my college professor while I was bunking the class.

My question is based upon Mechanisms of Catalyst Deactivation topic in portion Suspended Solid Reactors, Catalyst Deactivation, Diffusion and Reaction of Chemical Reaction Engineering

Answer 1

Correct option is (c) Rate at which the catalytic pellet converts the reactant to the rate of reaction with a fresh pellet

For explanation I would say: Activity is a measure of the catalyst performance. It is defined as the ratio of rate at which the catalytic pellet converts the reactant to the rate of reaction with a fresh catalyst pellet.