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Membrane technology is simple, it exploits the selectivity of a membrane to different molecules.
The difference in partial pressure of different gases across the membrane is the most important parameter.
They work at high pressures (25-40 bar) or low pressures (9 bar).
The membranes can be based on polymers or cellulose acetate.
The use of membranes has the positive side of high system flexibility.
On the other hand, the high cost of selective membranes and the need to replace them at short intervals represents the weak point of this technology.
