Question

An absorber is to remove 99 percent of solute A from a gas stream containing 4 mol percent A. Solutions of A in the solvent follow Henry’s law, and the temperature rise of the liquid can be neglected.

(1) Calculate NOG for operation at 1 atm using solute-free liquid at a rate of 1.5 times the minimum value. (Answer: 10.74)

(2) For the same liquid rate, calculate NOG for operation at 2 atm and at 4 atm. (Answers: 6.33, 5.32 )

(3) Would the effect of pressure on NOG be partly offset by a change in HOG?

Answer 1