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Split_00074 - 9.60 a Basis 450 kmol CH 4 fed h n a kmol air...

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9- 74 9.60 a. Basis: 450 kmol CH fed h 4 CH 2O CO 2H O 4 2 2 2 + + kmol air / h)@25 C .21 kmol O kmol Stack [email protected] C .79 kmol N kmol (kmol CO h) (kmol H O h) 450 kmol CH / h @ 25 C kJ / h) (kmol O h) (kmol N h) [kg H O(l) / h] [kg H O(v) / h] 25 C 17 bar, 250 C a o 4 2 2 2 2 o o 2 o 2 1 2 2 2 o 3 4 n n n Q n n m m w w ( / / ± / ± / ± ( ± / ± / ± ± 0 300 0 Air fed 450 kmol CH 2 kmol O req'd 1.2 kmol O fed 1 kmol air h 1 kmol CH 1 kmol O req'd 0.21 kmol O kmol air h 4 2 2 4 2 2 : ± n a = = 5143 450 450 900 1 2 kmol / h CH react kmol CO h kmol H O h 4 2 2 = = ± , ± n n N balance mol h kmol N h 2 2 : ± . . n 4 6 0 79 5143 10 4060 = × = b g e j Molecular O balance mol O fed h 450 kmol CH react 2 mol O h 1 mol CH kmol O h 2 2 4 2 4 2 : ± . n 3 0 21 5143 180 = = b gb g 450 kmol CO h 900 kmol H O h 4060 kmol N h 180 kmol O h kmol / h 2 2 2 2 CO H O N O 2 2 2 2 U V | | | W | | | = = = = y y y y 0 0805 0161 0 726 0 0322 5590 . . . . Mean heat capacity of stack gas
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