Elementary Principles 102 - 4.69 (cont'd) Air feed rate: n0...

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4- 61 4.69 (cont’d) Air feed rate mol O h kmol air 0.21 kmol O kmol air fed 1 kmol air req'd. mol air 2 2 : . . . n 0 387 5 11 2 5 23065 == 90% 0100 75 85% 0150 25 95% 095 675 3 192 4 5% 005 675 3 101 1 2 3 3 propane conversion mol C H ) = 7.5 mol C H (67.5 mol C H reacts) hydrogen conversion mol C H ) = 3.75 mol H CO selectivity mol C H react) mol CO generated mol C H react mol CO CO selectivity mol CO generated mol CO 38 2 2 2 2 = ⇒= = = n n n n .( .(. . . H balance (75 mol C H mol H mol C H mol H mol C H mol H mol H O)(2) mol H O 2 2 2 2 :) ( ) ( ) (. ) () (. ) () ( . 82 5 2 7 5 8 375 2 2912 55 F H G I K J + =+ + = nn O balance ( .21 2306.5 mol O )(2 mol O mol O ) 4 m o l C O mol CO mol H O)(1) + 2 mol O mol O 2 2 2 22 2 :( . ) ( ) ) ( )( . ( ) . 0 192 2 1 1413 66 ×= ++ = N balance: mol N mol N 2 n 7 0 79 23065 1822 = = . ) Total moles of exit gas
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