We have two spiral-wound membranes for the separation of oxygen, A, from nitrogen, B, (in dry...

 

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We have two spiral-wound membranes for the separation of oxygen, A, from nitrogen, B, (in dry air). Both are operated at the same pressures and have the same properties: Ph = 100 cmHg, Pe=20 cmHg, P'A = 5x10-9 cm (STP)-cm/cm-s-cmHg, P'B = 2x10-9 cm (STP)-cm/cm-s-cmHg, t = 0.025 cm, and Am = 1.8x108 cm. For the case of = 10,000 cm (STP)/s and X=0.210, compare the values of Xp and V predicted for the following three configurations. Use the crossflow model. Note that the Cascade configuration includes recycle, so the solution must be iterated and converged. (a) Series (b) Parallel (c) Cascade Yp, Vp Xo, Lo Yp, Vp Xo, Lo Yp, Vp Xo, Lo Discuss the results. Specifically, explain why do the first two configurations give the same results, and why the cascade configuration gives a higher VR. We have two spiral-wound membranes for the separation of oxygen, A, from nitrogen, B, (in dry air). Both are operated at the same pressures and have the same properties: Ph = 100 cmHg, Pe=20 cmHg, P'A = 5x10-9 cm (STP)-cm/cm-s-cmHg, P'B = 2x10-9 cm (STP)-cm/cm-s-cmHg, t = 0.025 cm, and Am = 1.8x108 cm. For the case of = 10,000 cm (STP)/s and X=0.210, compare the values of Xp and V predicted for the following three configurations. Use the crossflow model. Note that the Cascade configuration includes recycle, so the solution must be iterated and converged. (a) Series (b) Parallel (c) Cascade Yp, Vp Xo, Lo Yp, Vp Xo, Lo Yp, Vp Xo, Lo Discuss the results. Specifically, explain why do the first two configurations give the same results, and why the cascade configuration gives a higher VR.