The minimum reflux ratio is<u> 0.37.</u>
Distillation is used to split liquids from nonvolatile solids, as inside the separation of alcoholic liquors from fermented substances, or inside the separation of two or extra beverages having specific boiling factors, as in the separation of gasoline, kerosene, and lubricating oil from crude oil.
Distillation contains partial reboiler and total condenser
Benzene and toluene is fed
xf = 0.50
xd = 0.95
xb = 0.05
The equilibrium data is for more volatile component (benzene)
Reflux is twice of the minimum
R = 1.5(Rmin)
R = 1.5(1.04545)
R = 1.568175
Intercept of enriching section operating line
= (xd/(R+1) ) = (0.95) /(1.568175+1) = 0.37
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distillation unit consists of partial reboiler; column with seven equilibrium plates_ and total condenser. The feed is 50 mol% mixture of benzene and toluene It is desired to produce distillate product containing 96% benzene when operating at I01 kPa. Equilibrium data of the binary mixture at [0[ kPa is given below in mole fraction of benzene: 0.2[ 0.37 051 0.64 0.72 0.79 0.86 0.91 0.96 0.98 Sketch the distillation process and label the streams. Clearly state any assumptions that YOu use With saturated liquid feed t0 the fifth plate from the top, calculate The minimum reflux ratio (LID)n The bottoms product composition using reflux ratio twice the minimum 3 . Moles of product per I00 moles of feed Repeat part (b) for saturated vapor feed fed to the fifth plate from the top With saturated vapor feed fed to the reboiler and reflux (LIV) of 0.9 calculate Bottoms product composition 2. Moles of products per [00 moles of feed
