An air stream is contaminated with benzene, and your task is to remove the toxic benzene. An air-benzene mixture at 298 K and 1 bar contains 0.75 mol% benzene and is fed countercurrently at a rate of 5000 L/second to a moving stream of activated carbon. In this process, 85% of the benzene is to be removed. The entering activated carbon to the process contains 20 cm3 benzene vapor (at STP) per gram of carbon.

(a) Plot equilibrium data as X = kg benzene/ kg dry carbon vs. Y = kg benzene/kg air for a pressure of 1 atm (total).

Equilibrium data for this system at 298K and 1 bar may be assumed to be