An absorption column is fed at the bottom with a gas containing 5 percent benzene and 95 percent air. At the top of the column a nonvolatile absorption oil is introduced, which contains 0.2 percent benzene by weight. Other data are as follows: 

Feed, 2.000 kg of absorption oil per hour 

Total pressure, 1 atm 

Temperature (constant), 26°C 

Molecular weight of absorption oil, 230 

Viscosity of absorbing oil, 4.0 cP 

Vapor pressure of benzene at 26°C. 100 mm Hg 

Volume of entering gas, 0.3 m³/s 

Tower packing, Intalox saddles, 1-in. nominal size 

Fraction of entering benzene absorbed, 0.90 

Mass velocity of entering gas, 1.1 kg/m²·s 

Calculate the height and diameter of the packed section of this tower. Assume Raoult's law applies.