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A porous metallic membrane is used to remove H2 from N2 at a temperature of 130C and a pressure of 2 atm. The metallic membrane

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A porous metallic membrane is used to remove H2 from N2 at a temperature of 130C and a pressure of 2 atm. The metallic membrane has a tortuosity of 7, porosity of 0.45, a specific surface area of 3000 m2/g, and a bulk density of 2 g/cm. If the ordinary diffusivity DAB of hydrogen gas diffusing through nitrogen gas is 0.9 cm2/s, estimate the effective diffusivity DA, eff of H2 in the porous metallic membrane

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