A hydrogen-rich gas stream contains 1.0 mole % carbon monoxide. It is desired to use a microporous ceramic membrane for separating carbon monoxide (CO) from hydrogen gas at a pressure of 1 atm and a temperature of 400C. The average pore diameter of the membrane is 15 nm and the void fraction is 0.30. a) Estimate the molecular diffusivity of CO in a mixture with H2 b) Determine the Knudsen diffusion coefficient and the effective diffusion coefficient for CO in the membrane

Question

A hydrogen-rich gas stream contains 1.0 mole % carbon monoxide. It is
desired to use a microporous ceramic membrane for separating carbon
monoxide (CO) from hydrogen gas at a pressure of 1 atm and a temperature of 400C. The average pore diameter of the membrane is 15 nm and the void fraction is 0.30.


a) Estimate the molecular diffusivity of CO in a mixture with H2


b) Determine the Knudsen diffusion coefficient and the effective diffusion
coefficient for CO in the membrane

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