A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A → B. Film mass transfer resistance is negligible and pore diffusion of A is rate controlling. The effectiveness factor of the catalyst is reported as 7/8. Which of the following statement is true? Options: A . &nbspInner catalyst core of radius R/8 does not participate in reaction B . &nbspInner catalyst core of radius R/2 does not participate in reaction C . &nbspInner catalyst core of radius 7R/8 does not participate in reaction D . &nbspEffectiveness factor for a zero order reaction cannot be 7/8 as it must always be 1

A spherical porous catalyst particle of radius R is subjected to reactant A whic

Question

A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A → B. Film mass transfer resistance is negligible and pore diffusion of A is rate controlling. The effectiveness factor of the catalyst is reported as 7/8. Which of the following statement is true?

Options:

A . Inner catalyst core of radius R/8 does not participate in reaction

B . Inner catalyst core of radius R/2 does not participate in reaction

C . Inner catalyst core of radius 7R/8 does not participate in reaction

D . Effectiveness factor for a zero order reaction cannot be 7/8 as it must always be 1

Answer: Option A
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