For a first order isothermal chemical reaction in a porous catalyst, the effectiveness factor is 0.3. The effectiveness factor will increase if the____________________?
(A) Catalyst size is reduced or the catalyst diffusivity is reduced
(B) Catalyst size is reduced or the catalyst diffusivity is increased
(C) Catalyst size is increased or the catalyst diffusivity is reduced
(D) Catalyst size is increased or the catalyst diffusivity is increased
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