Using the equilibrium data for nicotine extraction provided in example 27.4-3 in your text (Geankoplis), determine the number of theoretical steps needed to reduce the nicotine concentration in water from 0.8 wt% to 0.1 wt%. The flowrate of the inlet water/nicotine stream is 200 kg/hr. The inlet kerosene flowrate is 350 kg/hr and it contains 0.0002 kg nicotine per kg of kerosene. For this system using a packed tower, the height of a transfer unit (HOL) has been estimated as HOL = 1.1m. Calculate the number of transfer units by two different methods and compare the values. Also calculate the tower height. 

b) Calculate the mass of benzoic acid per liter of kerosene needed produce a solution with a benzoic acid weight fraction of 0.005.

 

Equilibrium Data with x the weight fraction of nicotine in the water and y in the kerosene:

x	y	x	y
0.001010	0.000806	0.00746	0.00682
0.00246	0.001959	0.00988	0.00904
0.00500	0.00454	0.0202	0.0185