Elementary Principles 430 - 9.61 (cont'd) 101 10 8 = 8.31...

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9- 78 c. ⇒×=× −+ + −× ⇒= 101 10 8 31 10 30 59 92 30 0 031 30 142 10 30 150 85 2 23 3 5 4 4 .. ( ) . ( ) . ( ) . ( ) TT T T T aa a a a D C 5.95 10 mol O /h 40,000 kg coal/h 6 × 2.24 10 mol N 7 × 3.61 10 mol H O( )/h 5 × 150°C(= 149.8°C) 25°C 4400 kg ash/h at 450°C 2 2 2 v Flue gas at 260°C 2193 10 mol CO /h 6 × 2 0.337 10 mol CO/h 6 × 3.206 10 mol O 6 × 2 22.38 10 mol N 6 × 2 1.351 10 mol H O( )/h 6 × 2 v 50°C m (kg H O( )/h) 2 l 30 bars, sat'd m (kg H O( )/h) 2 v References for energy balance on furnace : CO , CO, O , N , H O l , coal at 25 C 2 222 bg ° (Must choose HOl 2 since we are given the higher heating value of the coal.) substance Coal kg h Ash kJ kg O1 0 3 1 0 N 2 24 10 10 mol h CO 10 kJ mol CO 10 HO 1 0 in in out out 66 2 67 2 6 6 2 6 nHn H n H n H ±± . ± . . . . ± . . 40000 0 4400 412 25 595 3758 206 7193 3655 2 24 6 918 2193 9 738 0337 6961 361 10 4828 1351 5214 2 5 −− ×× × × (Furnace only — exclude boiler water) Heat transferred from furnace
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This note was uploaded on 02/27/2012 for the course CHEMICAL E 312 taught by Professor Cheung during the Fall '11 term at The University of Akron.

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