Chemical Engineering > GATE 2011 > Catalysis
For a first order catalytic reaction the Thiele modulus (φ) of a spherical pellet is defined as φ=(Rs/3)√(kρp/De) where ρp=pellet density, De=effective diffusivity, Rs=pellet radius, k=first order reaction rate constant. If φ>5, then the apparent activation energy (Ea) is related to the intrinsic (or true) activation energy (E) as
Correct : b
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