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A polyethylene (PE) membrane is being used as an oxygen barrier. Oxygen is being supplied on...

A polyethylene (PE) membrane is being used as an oxygen barrier. Oxygen is being supplied on the high pressure side at 0.25 kg/m3, and on the other side is a vacuum (concentration of oxygen is 0 kg/m3). If the desired flux is 4E-8 kg/m2s, what should the thickness of the PE membrane be? Answer in mm. The diffusion coefficient of oxygen in PE at the operating temperature is 4.5E-11 m2/s.

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Homework Answers

Answer #1

Given Data:

Flux,

Concentration of oxygen at high pressure side,

Concentration of oxygen at low pressure side,

Diffusion coefficient,

Solution:

Using Fick's first law of diffusion,

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