Elementary Principles 425 - 9.59 (cont'd) CH 4 + 2O 2 CO 2...

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9- 73 CH 2O CO 2H O 42 22 +→ + , CH O 6CO 7HO 61 4 2 2 2 19 2 +→+ Theoretical O 9.30 mol CH 2 mol O s 1 mol CH 0.70 mol C H 9.5 mol O s1 m o l C H mol O s 2 4 4 2 4 2 :. += 253 100% excess ⇒= × = × = O2 O m o l a i r s 2 fed 2 theor. bg 0 21 2 253 240 95 . ± . ± . nn aa N balance: mol N s 0 79 240 95 190 35 44 .. ±± . =⇒= C balance: 9.30 mol CH 1 mol C m o l C H 0.70 mol C H 6 mol C 1 mol C H mol CO 1 mol C 1 mol CO mol CO s 4 4 4 4 2 2 2 n n 5 5 135 ± . H balance: 930 4 070 14 2 235 6 . mol CH s mol H mol CH mol H O 6 2 b g b g b g b g = Since combustion is complete, OO O m o l O s 2 remaining 2 excess 2 fed 2 ==⇒ = 1 2 3 ± . n References : C s , H g , O g , N g at 25 C 222 ° for reactor side, HOl 2 at triple point for steam side (reference state for steam tables) Substance mol / s kJ / mol mol/s kJ / mol CH 9.30 CH v O N CO HOv H O boiler water (kg / s) kg / s) in in out out 4 4 2 2 2 2w w ± ² ± ² . ... . . . ± . ± (. n H n H mm −−
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