Question

A vapor stream containing 3.0 mole % of benzene is scrubbed with wash oil in a packed absorber to reduce the benzene concentrati on in the gas to 0.02 %. T he oil has an average molecular weight of 250 a nd density of 54.6 lb/ft 3 and contains 0.015 % benzene. T he gas flow rate is 1500 ft 3 /min at 25 o C and 1 atm. I f the scrubber operates isothermally at 25 o C with liquid rate of 14000 lb/h . H ow many transfer units are required

Answer 1