Estimate the effective diffusivity of thiophene (molecular weight 84) in hydrogen at 660K and 30 atmospheres in catalysts pellet having an internal surface area of 180 m'g, a pellet porosity of 0.4, and a pellet density of 1.4 g/cm?. The mutual diffusivity of thiophene in hydrogen is known to be 0.052 cm²sec² at 660 K and 30 atmospheres. The tortuosity factor t = 4. (Gas constant Rm = 8.314 Jmol² K". Assume volume change in any reaction is zero. %3D

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