An absorption column is to be designed to recover 99.5% of the NH3 from a feed stream, which is supplied at 72 F and an NH3 partial pressure of 10 mm Hg. The feed stream contains 2100 lbm/hr of air. The column operates at 1 atm, is supplied with pure water at 72 F that flows at 1.5 times the minimum water rate. Hoy for the operation is 1.9 ft.
Find the minimum water rate , in lbm/hr.