Elementary Principles 274

# Elementary Principles 274 - 7.51. Basis: 1 mol feed B =...

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7-29 7.51 . Basis: 1 mol feed (1 – ) B = benzene z T = toluene 1 mol @ 130°C B (mol B( l )/mol) z B (mol T( l )/mol) (1 – ) n V y (mol vapor) B (mol B( v )/mol) y B (mol T( v )/mol) (1 – ) n L x (mol liquid) B (mol B( l )/mol) x B (mol T( l )/mol) in equilibrium at T (°C), P (mm Hg) (a) 7 variables: ( , , , , nynxQ TP VBLB , , ) –2 equilibrium equations –2 material balances –1 energy balance 2 degrees of freedom. If T and P are fixed,we can calculate and . nynx Q ,,,, (b) Mass balance: nn n n VL V += = 11 2 (1) Benzene balance: zn yn x BV B L B = + (2) CH : 66 lT H bg di == 00 , ± , TH H T BL ==⇒ = 80 1085 01356 , ± . ± . (3) : vT H 80 4161 , ± ., H T BV = + 120 4579 01045 3325 , ± . ± .. (4) 78 H :, ± , H T TL = 111 1858 01674 , ± . ± . (5) H ± . 89 4918 , H T TV = + 111 52 05 01304 37 57 , ± . ± (6) Energy balance: neglect Δ Δ EW E ps k ,, = 0 Q HnyH n yH nxH n xH zH T V B BV V B TV L B BL L B TL B BL F BT LF + + + −− Δ ±± ± ± 1 bgb g b g b g b g (7) Raoult's Law: (1- yP xp yP xp BB B T = =− * * )( ) 1 (8) (9) Antoine Equation. For T= 90°C and P=652 mmHg:
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## This note was uploaded on 02/27/2012 for the course CHEMICAL E 312 taught by Professor Cheung during the Fall '11 term at The University of Akron.

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