Question 4

A solvent recovery system delivers a gas saturated with benzene vapour which analyzes on a benzene-free basis as follows: CO: 11%, O₂: 7% and N₂: 82%. This gas is at 21.1 °C and 750 mm Hg. It is compressed to 5 atm and cooled to 21.1 °C after compression. How many kilograms of benzene are condensed by this process per 1000 m³ of original mixture? The vapour pressure of benzene at 21.1 °C is 75 mm Hg.