A two-bed carbon adsorption system is to be designed to handle 8000 acfm of air containing 700 ppm of hexane. Laboratory studies indicate that carbon can adsorb 8 Ib hexane per 100 Ib carbon under the conditions at which the system will be operated (net adsorption). If the system is to operate at 90ºF and 1 atm and flow velocity of 100 ft/min. 1) Determine the diameter of each carbon bed (in ft). Bed regeneration and cooling will require one hour. Assume carbon density is 25 Ib/ft. The bed depth should be at least 1ft. 2) Determine the mass of carbon (in Ib). Bed regeneration and cooling will require one hour. Assume carbon density is 25 Ib/ft. The bed depth should be at least 1 ft. 3) Calculate the pressure drop if 4x10 carbon is used (in inch of water). Bed regeneration and cooling will require one hour.