is Calculate the pressure drop across the bed when this with 3000ppm benzene flowing at 20c and I atm pressure through an activated carbon (particle size 1.25cm) bed of 150cm diameter and 250 cm height, at a rate of 5m/min. The operating capacity of the bed is 1kg benzeneper 10kg carbon. The physical properties of the carbon bed are as follows: Bulk density = 35 kg/m porosity of the bed is 0.4 the viscosity of air is 0.0182 Centi-poise and the density is 0.001156qm/cc.