Question:

An absorption column is fed at the bottom with a gas containing 5 mole

percent benzene and 95 mole percent air. At the top of the column a

nonvolatile absorption oil is introduced, which contains 0.2 mole percent

benzene. Other data are as follows: For this system, Henrys law holds and y= 2.45x. Other data are as follows:

Mass velocity of absorption oil, 5.6 kg/m^2 s

Total pressule, 1 atm

Tomperature (constant), 26 degrees Celsius

Molecular weight of absorption oil, 23

Tower packing, intalox saddles, 1 inch nominal size

Fraction of entering benzene absorbed, 0.90

Mass velocity of entering gas, 1.1 kg/m^2 s

Calculate the overall gas-phase and liquid-phase transfer units needed.

NB: Assume mole fractions approximately equal to mole ratios.

An absorption column is fod at the bottom with a gas containing 5 mole parcent benzone and 95 mole percanti. At the top of the column a nonvolatile absorption oil is introduced which cantins 0 2 mole percent banzane for this system Honry's Law holds and yo 2.45 Cthor data are as follows: Mass velocity of absorption of 5.6 kg/ ms Total pressure, 1 am Temporatura constant), 26C Molecular weight of absorption oll. 23 Towar packing Intalax saddles, 1 inch nominal size Fraction of entering benzano absorbed, 000 Moss velocity of entering os, 11 kg/m's Caleuitate the overall gas phare and liquid phose transfer units needed NO: As come more froctions approximately equal to moderations