The document discusses gas membrane separation using hollow fiber membranes to separate an air stream into enriched oxygen and nitrogen streams. An experiment was conducted to determine the optimal conditions for separation, with the highest oxygen concentration achieved at the largest pressure difference and higher flow rates. The results showed that the experimental selectivity increased with the pressure difference but was slightly lower than the ideal selectivity value.

1. Gas Membrane Separation Separations & Reaction Engineering Lab March 21, 2006 Kate Cannady Christopher Miller Matt Mobily Jennifer Pratt

11. Theory Flux of A across film: Flux of B across film: x A = mole fraction of A on high pressure side (reject) y A = mole fraction of A on low pressure side (permeate) P L = reject pressure P V = permeate pressure P A = permeability of A P B = permeability of B t = membrane thickness A variation of Fick’s…

12. More Theory… In terms of selectivity: From before: and become and

13. And More Theory… So… Recall that

15. Data & Results For calculating selectivity… P L y A x A P V y B = (1-y A )

16. Data & Results Selectivity Results for Collected Data: Recall α ideal = 5.80