4127Chemical EngineeringMedium
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?
AInner catalyst core of radius 7R/8 does not participate in reaction
BEffectiveness factor for a zero order reaction cannot be 7/8 as it must always be 1
CInner catalyst core of radius R/8 does not participate in reaction
DInner catalyst core of radius R/2 does not participate in reaction
Correct answer
C. Inner catalyst core of radius R/8 does not participate in reaction
Explanation
The correct answer is Inner catalyst core of radius R/8 does not participate in reaction.