Elementary Principles 209 - 6.61 a. F (mol) x 0 (mol...

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6- 43 6.61 a. (mol) F (mol butane/mol) x 0 T P Condenser (mol) V 0.96 mol butane/mol (mol) R (mol butane/mol) x 1 Partial condenser: C is the dew point of a 96% C H 4% C H vapor mixture at 41 0 51 2 40 ° = PP min Total condenser: C is the bubble point of a 96% C H - 4% C H liquid mixture at 0 2 40 ° = min Dew Point: C C min (Raoult's Law) 1 40 1 40 == ° ⇒= ° ∑∑ x yP p P yp i i i ii bg Antoine Eq. for pH i + F H G I K J C mmHg 0 6.82485 943 40 239 10 2830 70 .453 .711 . Antoine Eq. for () 1060.793 6.84471 40 231.541 2 C 10 867.22 mmHg i ⎛⎞ ⎜⎟ + ⎝⎠ + = P min Hg partial condenser 1 0 96 2830 70 0 04 867 22 2595.63 mm .. . . Bubble Point: C Py Px p i ° 40 P =+ = 0 96 2830 70 0 04 867 22 275216 . . . b g b g mm Hg total condenser b. ± V = 75 kmol / h , ±± . ± . RV R =⇒ = 15 75 15 112.5 kmol kmol / h / h Feed and product stream compositions are identical: 0.96 kmol butane kmol y = Total balance: / h ± . F = 75 112 5 187.5 kmol c. Total balance as in b. kmol / h
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