Ethylene oxide (C2H4O) is a high-volume chemical intermediate that is used to produce glycol and polyethylene glycol. Ethylene oxide is produced by a partial oxidation of ethylene (C2H4) using a solid catalyst in a fixed bed reactor C2H4+1/2O2C2H4O In addition, a portion of ethylene reacts completely to CO2 and H2O C2H4+3O22CO2+2H2O The product gas leaving the fixed bed ethylene oxide has the following water free composition: 20.5%C2H4O,72.7%N2,2.3%O2 and 4.5%CO2. Determine the percent excess air based in the desired reaction and the lbm/h of ethylene feed required to produce 100000 ton/yr of ethylene oxide