Elementary Principles 444

# Elementary Principles 444 - 9.69 (cont'd) Stripper off-gas...

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9- 92 c. d. e. f. Stripper off-gas 279.7 mol CO h 279.7 mol CH h 30308 mol H O h 3392 mol CO h 10 mol h kmol h .82% CO, 0.82% CH O, 9.9% CO 4 2 4 42 34259 34.3 0 88.5% H 2 . ,, × U V | | W | | DMF recirculation rate F H G I K J F H G I K J 0 917 5086 10 1 5 .. mol h kmol 10 mol 3 = 466 kmol DMF h Overall product yield == 0 991 7955 0154 . . bg mol C H in product gas 51120 mol CH in feed h mol C H mol CH 22 4 4 The theoretical maximum yield would be obtained if only the reaction 2CH C H 3H →+ occurred, the reaction went to completion, and all the CH formed were recovered in the product gas. This yield is (1 mol C 2 H 2 /2 mol CH 4 ) = 0.500 mol C 2 H 2 /2 mol CH 4 . The ratio of the actual yield to the theoretical yield is 0.154/0.500 = 0.308 . Methane preheater ±± ± QH n C d T p CH Table B.2 CH 3 4 4 mol 32824 J 1 h 1 kJ h mol 3601 s 10 J kW = = B z Δ 14 25 650 51120 466 di Oxygen preheater . ± ² (, . ± ² .... QHn H n H O Table B.8 2 Table B.8
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