Question $1.$

Is concentration polarization a desirable phenomenon or not?

Why? Describe critically its technological implications.

Question $2.$

Is concentration polarization especially relevant in gas

separation

or liquid separation? Discuss critically and provide a

quantitative

justification to your answer.

Question $3.$

Describe in quantitative terms the effect of mass transfer

coefficient outside the membrane on concentration polarization.

Should mass transfer coefficient be high or low? And which

technological solutions can we implement to modify the mass

transfer coefficient outside the membrane? Discuss critically and

quantitatively, providing, if needed, some examples.

Question $4.$

Describe a possible approach to determine the mass transfer

coefficient outside the membrane.

Question $5.$

Describe the concept of membrane fouling.