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Estimate the diffusivity of CO in O2 in the porous catalyst at 200 deg C and 2.0 atm if the pore size of catalyst is

Estimate the diffusivity of CO in O2 in the porous catalyst at 200 deg C and 2.0 atm if the pore size of catalyst is 0.1 m, porosity is 0.42 and the tortuosity is 2.6. Assume both molecular diffusion and Knudsen diffusion in the pores.

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