A gas desorption (stripping) column is being designed to remove 87.5% of the ammonia in an inlet liquid water stream containing an ammonia mole fraction of 0.074 . The liquid stream will enter at the top of the column at a rate of 90.72kg-mol water per hour (ammonia free basis). Pure air (no ammonia) will enter at the bottom of the column. The column will operate at 1 bar and 30C. a) Determine the molar ratio of ammonia in the inlet water (molNH3/mole2O). b) Determine the molar ratio of ammonia in the exit water (mol NH3/moleH2O). c) If the air rate entering at the bottom of the column is 74.843kgmol air / hour, determine the molar ratio of ammonia in the exit air (mole NH3/ mole air). d) If the column diameter is 0.61m and the overall mass transfer coefficient (Kya) is 96.127kgmol/m3hr, calculate the height (m) of a transfer unit (HTU). (see the attached equilibrium curve.) e) Calculate the number of transfer units (NTU) required. f) How does your calculation compare to the graphical method? g) Calculate the required column height (m)