Question

a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 in the polymer at 10 atm is 6.97*10-4 moles/cm3 at 35⁰ C. The diffusivity of CO2 in the polymer is known to be 2.28*10-8 cm2/s at this temperature. How long will it take for 0.001 moles of CO2 to leak from the container at steady-state? Assume that the amount of carbon dioxide in the surroundings is insignificant.

Express your answer in seconds.

Answer 1

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