The slope of the curve of ln\((ln\frac{C_A}{C_{A∞}})\) and t for batch solid – fluid independent deactivation system is ___

(a) ln(lnkd)

(b) ln(kd)

(c) kd

(d) -kd

I have been asked this question by my college director while I was bunking the class.

I’d like to ask this question from Mechanisms of Catalyst Deactivation in chapter Suspended Solid Reactors, Catalyst Deactivation, Diffusion and Reaction of Chemical Reaction Engineering

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