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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.

% O 2

and

80

vol.

% N_{2}

is separated by an

O_{2} -

selective membrane and a

permeate gas stream containing

75

vol.

% O_{2}

is obtained. Calculate the

N_{2}

rejection

R

and the

separation factor

(

.

.,

separation selectivity

)_{O \frac{2}{N} 2} .

Which of the two parameters is more

suitable for describing the performance?

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