Q5. 12000 lb/hr of crude oil (API=34) at 650 °F is fed to an atmospheric distillation column operating with ot reflux. Steam at a rate of 600lb/hr and 580 °F is used. The fractions obtained were as follow: Vol.% M.W Fractions m lb/hr 3400 1200 3000 3400 2 Btu/lb 120 100 90 100 185 270 Temp. °F 310 420 510 510 Gasoline 15 Kerosene 25 Gas Oil 18.2 Residue 42.8 1. Calculate the heat must be removed. 2. Check the top tower temperature if the dew point of gasoline are 296°F, the storage temperature=100°F and the pressure at top plate is 780 mmHg. 3. Calculate the tower diameter if k=735 and p(liq.). Given: Cp,-0.6, Cp =0.7 and Cp, steam=0.5Btu/lb.°F =42.7 lb/ft³.

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