Elementary Principles 385

Elementary Principles 385 - 9.28 (cont'd) Reactor : . n 3...

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9- 33 b. Reactor : n 3 (mol C 8 H 10 /h) n 4 (mol H 2 O( v )/h) 600°C . n 5 (mol C 8 H 10 /h) n 4 (mol H 2 O(v)/s) v 560°C 960 (mol C 8 H 8 /s) 960 (mol H 2 /s) Q c (kJ/h) 35% 1-pass conversion ⇒= 035 960 3 . n mol C H react 1 mol C H h1 m o l C H mol C H h 81 0 88 0 bg ± n 3 2740 mol C H h fed to reactor 0 Recycle rate mol C H h recycled 0 = = 2740 960 1780 a f Reactor feed mixing point 2740 mol C 8 H 10 (v)/h 500 o C 2740 mol C 8 H 10 (v)/h n 4 [mol H 2 O(v)/h] n 4 [mol H 2 O(v)/h] 600 o C 700 o C Neglect , CH HO Energy balance: kJ h 0 2 QE k HH n H Δ ΔΔ Δ =+ = 2740 0 4 ² ± ² Δ ² .. HT d T C p 3 0 J mol C 1 kJ 10 J kJ mol L N M M M O Q P P P ×= z 118 0 30 28 3 500 600 ³´ µ µ¶ µµ D Δ ² . H P bar Table B.8 2 kJ mol = 1 39 2740 28 3 3 9 0 199 10 44 4 af a fa f . ± . ± . +− = × nn mol H O / h 2 Ethylbenzene preheater A : 960 1780 mol r 2740 mol E mol fresh feed h ecycled h Bl h at 25 C 2740 mol EB v h at 500 C
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