Elementary Principles 451 - 10.3 (cont'd) c. Design set: x...

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10- 3 10.3 (cont’d) c . Design set: xxTnQ Bc ,,,, 2 0 lq Specifying x B determines n 2 impossible design set. d . Design set : xxTPQ e x ,,, , 0 Calculate n 2 from x B , n 3 from x B n 0 from xx and P ex n 1 from C material balance, n 4 from total material balance T f from energy balance (trial-and-error probably required) 10.4 2C H OH O 2CH CHO 2H O 25 2 3 2 +→ + 2CH COH O 2CH CHOOH 32 3 T (kJ) Q 0 (mol solution), n f x ef (mol EtOH/mol) 1 – x ef (mol H O/mol) 2 P , xs (mol air), n w T 0 0.79 (mol N ) n 2 0.21 (mol O ) n air 2 T (mol EtOH), n e n ah (mol CH CHO) 3 n ea (mol CH COOH) 3 n w (mol H O) 2 n ax (mol O ) 2 n n (mol N ) 2 P xs = % excess air) ( air a . 13 6 1 1 2 7 00 variables material balances energy balance relation between and reactions degrees of freedom air nn nnn nnnx TTQP Pnx n f aw e eh ea w ex ef xs xs f ef ,,
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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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