Question: Air containing 2 0 vol. % O 2 and 8 0 vol. % N 2 is separated by an O 2 - selective membrane and

Air containing 20 vol. %O2 and 80 vol. %N2 is separated by an O2-selective membrane and a
permeate gas stream containing 75vol.%O2 is obtained. Calculate the N2 rejection R and the
separation factor (i.e., separation selectivity)O2N2. Which of the two parameters is more
suitable for describing the performance?
Air containing 20 vol. %O2 and 80 vol. %N2 is separated

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