Chemical Engineering > GATE 2017 > Thiele Modulus
Consider a first order catalytic reaction in a porous catalyst pellet. Given R - characteristic length of the pellet; De - effective diffusivity; kc - mass transfer coefficient; k1 - rate constant based on volume of the catalyst pellet; Cs - concentration of reactant on the pellet surface. The expression for Thiele modulus is
A
(A) kcR / De
B
(B) R √(k1 / De)
C
(C) R √(k1 Cs / De)
D
(D) R √(k1 / De)

Explanation

Correct : b

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