Elementary Principles 100

# Elementary Principles 100 - 4.67 (cont'd) Air feed rate: n...

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4- 59 4.67 (cont’d) Air feed rate: n f == 207.0 kmol O 1 kmol air 1.17 kmol air fed h 0.21 kmol O kmol air req. kmol air h 2 2 1153 b. nnx x x x P af x s =+ + + + 2 35 5 65 1 100 1 0 21 12 34 .. . bg b g b g c. ± ,( ± .) ± . ± ± ) ± . na Rn R n R nb R n R ff f f f f aa a a a a = = = = kmol / h, kmol / h, 750 60 125 550 25 22 0 xk A xkA k A x A A i ii i i i i i i =⇒ = = = ⇒= ∑∑ , = CH C H C H C H i i 42 43 84 1 0 1 1 ,,, d. Either of the flowmeters could be in error, the fuel gas analyzer could be in error, the flowmeter calibration formulas might not be linear, or the stack gas analysis could be incorrect. 4.68 a. C 4 H 10 + 13/2 O 2 4 CO 2 + 5 H 2 O Basis : 100 mol C 4 H 10 n CO2 (mol CO 2 ) n H2O (mol H 2 O) n C4H10 (mol C 4 H 10 ) P xs (% excess air) n O2 (mol O
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