Lecture_35 - “it: HAD} Cqu‘: —\/A Qg\ 2AA m M = 1:33:...

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Unformatted text preview: “it: HAD} Cqu‘: —\/A Qg\ 2AA m M = 1:33: HABACX:W?§'YA??\ N3 \Ilb"? H15 bu, LXQ?; —‘/Q?P3 \LKQENDCAQM'I‘R AW «.gg 7,, (2? «w, “6—,. an \(5??<c “'6; , M 40- lé X Q o4” Cmifl = “‘5‘ = “" a d I HE 5‘3 RM; “5&2 5% Max, GO A» (x / r ’3 VG\ - ‘4th a!“ :: 64 l _ B “‘6 (*s/yzn — *r a, “M; 04.27!) KXACMA E- \\ 4» I — fag“ 54* (dams-m + I - r r _ X? ' ?? MP 3 Y's 6) HM M x“: pr - yrle gxauuvaup+ ’_9 X4“ MK C"‘/P»)/C’ ' "RA 3 “qua: 4:; [XV-A LMM'D *’ \ " «34M; ‘1 (- X91 (uLM—|\+ l -— v ' \5" —n Xa‘fi:\/P )S—defiB. 44W :4 W4 9 MW... ohm 64.9. Ema—“1‘th (4.? 7% (4M W MAL’V 367. e\ 04.4.15 Vt“— WKM MM.“ A); Vb; 9:63-93, WM .W ' t .ia Q‘MJ‘:~ . ' °‘ ‘ ‘ w‘fim Ms Ck dem PM “ms ‘6 Ht“ ¥- 713$~ * °¢M:[ 0." Eel c &XIA “ \ln ~><A 7A 9, 944...! €44. 0k: YA/m \[ro Cl-YAB/CI‘XMB (D 2% in M M Cal-t\C_l-)<A\ ‘ [‘09. Amy 7% V, a“... .9 H'E kg“ (9 ‘lh -' SK ’7‘ cLu/MFQ W- I V (E .To-M‘M XRA)\/P‘_)O(s X*?MQIM (D 044.3 = Mitzi XL“ (“Ms ‘ ‘3 + “" Y°‘A.31 XL“ (“ms-1X 4- ‘ - \F Porous Permeate Dense Permeate Feed side membrane side Feed side membrane side (a) (b) Dense Permeate Porous Permeate _ ' Feed snde membrane Slde Feed side membrane side (c) (d) Figure 14.7 Concentration and partial pressure profiles for solute transport through membranes. Liquid mixture with (a) a porous and (b) a nonporous membrane; gas mixture with (c) a porous and (d) a nonporous membrane. Table 14.5 Factors That Influence Permeability of Solutes in Dense Polymers Value Favoring Factor High Permeability Polymer density low Degree of crystallinity low Degree of cross—linking 10w Degree of vulcanization low Amount of plasticizers high Amount of fillers 10w Chemical affinity of solute for polymer (solubility) high 0.01 0.2 0.4 0.6 0.8 0.99 0.208 0.174 0.146 0.124 0.108 0.095 YPA 0.406 0.353 0.306 0.267 0.236 0.211 2.602 2.587 2.574 2.563 2.555 2.548 Retentate Permeate AM, ft2 22,000 462,000 961,000 1,488,000 2,035,000 2,567,000 Permeate Differential volume element Figure 14.9 Crossflow model for membrane module. V 0 xRA ypA Stage (15 0.01 0.208 0.407 2.61 0.2 0.168 0.378 3.01 0.4 0.122 0.342 3.74 0.6 0.0733 0.301 5.44 0 8 0.0274 0.256 12.2 0.99 0.000241 0.212 1,120. Feed Retentate Feed Retentate Permeate Permeate Feed Retentate Feed Retentate Permeate Permeate (d) Figure 14.8 Idealized flow patterns in membrane modules: (a) perfect mixing; (b) countercurrent flow; (d) cocurrent flow; (d) crossflow. .0 A 0.3 Mole fraction of oxygen in permeate .9 N .0 Mole fraction of oxygen in retentate 0.1 0.2 0.3 0.4 0.5 0.6 0.7 Cut,6 Figure 14.10 Effect of membrane module flow pattern on . degree of separation of air. A, perfect mixing; B, countercur- rent flow; C, cocurrent flow; D, crossflow. ...
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This note was uploaded on 01/13/2010 for the course CHEM 1 taught by Professor Pines during the Winter '08 term at University of California, Berkeley.

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Lecture_35 - “it: HAD} Cqu‘: —\/A Qg\ 2AA m M = 1:33:...

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