13-58 - 13-58 Equations Set 38 Problem 13-58 Adiabatic...

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Unformatted text preview: 13-58 Equations Set 38: Problem 13-58 Adiabatic Combustion of Propane at 25 C with Air at 25 C. Plot the adiabatic combustion temperature versus percent theoretical air, X. Reaction: C3H8 + 5 (X/100) (O2 + 3.76 N2) 3 CO2 + 4 H2O + 3.76 (5 X/100) N2 + 5X/100 O2 HR = h (C3H8, T = 298) + 5 (X/100) h (O2, T = 298) + 3.76 (5 X/100) h (N 2, T = 298) HP = HR (1) (2) HP = 3 h (CO2, T = T ) + 4 h (H2O, T = T ) + 3.76 (5 X/100) h (N 2, T = T ) + (5 X/100 - 5) h (O2, T = T )(3) Solution HP = -104276 [kJ/kmole] X = 400 HR = -104276 [kJ/kmole] T = 964.4 [K] Table 1 Run 1 2 3 4 5 6 7 8 9 10 11 X 100 130 160 190 220 250 280 310 340 370 400 T [K] 2395.4 2014.3 1753.2 1562.7 1417.3 1302.5 1209.4 1132.4 1067.6 1012.2 964.4 Plot Window 1 ...
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13-58 - 13-58 Equations Set 38 Problem 13-58 Adiabatic...

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