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Split_00031 - 9.27 a 1200 lb m C 9 H 12 1 lb mole = 10.0 lb...

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9- 31 9.27 a. b. Basis : 1200 lb C H 1 lb - mole h 120 lb lb - moles cumene produced h m 9 12 m = 10 0 . Overall process : 0.75 C H n 1 (lb-moles/h) 3 6 0.25 C H 4 10 n 2 (lb-moles C H /h) 6 6 n 3 10.0 lb-moles C H /h 9 12 (lb-moles C H /h) 3 6 n 4 (lb-moles C H /h) 4 10 C H l C H l C H l , F Btu lb - mole 3 6 6 6 9 12 r b g b g b g b g + ° = − Δ ± H 77 39520 input consumption 9 12 6 6 9 12 6 6 m 6 6 m 6 6 Benzene balance: 10.0 lb - moles C H produced 1 mole C H consumed h 1 mole C H produced 10.0 lb - moles C H lb C H h 1 lb - mole lb C H h = = = = b g ² . n 2 781 781 input output consumption 9 12 3 6 9 12 Propylene balance: 0.75 10.0 lb - moles C H 1 mole C H h 1 mole C H = + = + b g ² ² n n 1 3 C H unreacted lb - moles h lb - moles C H h 3 6 3 6 20% 0 75 10 0 20 0 75 16 67 2 50 1 3 3 1 1 3 = + = U V W = = . ² ² ² . . ² ² . ² . n n n n n n b g Mass flow rate of C H / C H feed 0.75 lb - moles C H 42.08 lb C H h 1 lb - mole 0.25 lb - moles C H 58.12 lb C H h 1 lb - mole lb h 3 6 4 10 3 6 m 3 6 4 10 m 4 10 m = + = b gb g b gb g 16 67 16 67 768 . . Reactor : Benzene feed rate 10.0 lb - moles fresh feed moles fed to reactor
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