Answers to Selected Odd-Numbered Exercises in
“Separation Process Principles” by
J. D. Seader and Ernest J. Henley
Chapter 6
6.1 Stripping of water is 22 kmol/h
Absorption of acetone is 10.25 kmol/h More stripping than absorption
However, operation is absorption because a high percentage of acetone is absorbed.
6.5 Advantages of air are ready availability and low cost.
Disadvantage of air is the possibility of forming a flammable mixture. 6.7 (a) 0.98 mol amine solution/mol feed gas
(b) 2.2 mol% CO2
6.9 (a) 0.30 (b) 10 (c) 0.34
6.11 6,190 scfm of air 14 equilibrium stages
ppm in drinking water: DCA 0.005, TCE 0.000, and TCA 0.000. 6.15 Drickamer-Bradford: 10.8%
O'Connell: 19% 6.25 (a) 57% absorbed
(b) 0.0054 lbmol/ft3
6.31 (a) 1.63
(b) 0.0303 mol CO2/mol caustic solution
(c) 6.7 theoretical stages (d) 1,824 lbmol/h
(e) column floods, must increase diameter (f) 7.7 overall gas transfer units
