mass transfer

100kgmol/hr of saturated liquid containing 20mol%LNK,50mol%LK,30mol %HK and is to be separated in a distillation column. The reflux ratio is 1.25 times the minimum ( R=1.25Rmin ). It is desired to have 99.5% recovery of the light key (LK) in the distillate. The mole fraction of the light key in the distillate should be 0.75. For this multi component distillation column, determine the following: a) Minimum number of stages required using Fenske method. b) Minimum reflux ratio using the Underwood method. c) The number of ideal stages at (R=1.25Rmin) using Gilliland method. d) The number of ideal stages at rectifying section and stripping section at the operating reflux ratio and the feed plate location using Kirkbride method. Minimum nunber of stages using Fenskie method i=HKLKLK,HK2 Underwood method: iixF=1q Value of pis found by trial error between LK,HK