Split_00075 - 9.60(cont'd H p = n2 H v H o 2 O(25 C nstack gas(C p stack gas(Tstack gas 25o C 0.0315 kJ(300 25 o C mol o C 3 5590 kmol 10 3 mol =

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9- 75 b. ± ± ( ² ) ± () ( . HnH n C T pv p =+ + × 2 HO (25C ) stack gas stack gas stack gas o 2 3 3o o 7 2 o C) = 180 kmol H O 10 mol kJ h 1 kmol mol kmol 10 mol 0.0315 kJ (300-25) C h 1 kmol mol C = 5.63 10 kJ / h Δ 25 44 01 5590 ±± ± ( ² ) ²² .. . QH H n H n H ii == + F H G I K J F H G I K J F H G I K J = −× ΔΔ ξ c o CH out in 4 450 kmol h mol kmol kJ mol kJ h kJ h 1000 890 36 563 10 344 10 78 Energy balance on steam boiler ± ± ² ± ± . Qm H m m ww w w =⇒ × = F H G I K J L N M O Q P L N M O Q P ⇒= × Δ +3.44 10 kJ h kg h kJ kg kg steam / h 8 Table B.7 Table B.6 2914 105 123 10 5 bg 45 kmol CH 4 /h 25°C furnace Liquid, 25°C m w (kg H O/h) 2 vapor, 17 bars m w (kg H O/h) 2 250°C n 1 (mol O /h) 2 n 2 (mol N /h) 2 n 3 (mol CO /h) 2 n 4 (mol H O/h) 2 n a (mol air/h) at T a (°C) air preheater n a (mol air/h) at 25°C 0.21 O 2 0.79 N 2 n 1 /h) 2 n 2 /h) 2 n 3 /h) 2 n 4 (mol H O/h) 2 Stack gas 300°C 150°C E.B. on overall process : The material balances and the energy balance are identical to those of part (a), except that the stack gas exits at 150 o C instead of 300
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This note was uploaded on 01/07/2012 for the course CH E 210H at Pennsylvania State University, University Park.

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