3. Hydrogen is used to reduce 1000 kg/h Fe2O3 to metallic iron according to the reaction Fe2O3 + 3H2 2Fe + 3HO The water is condensed and the unreacted hydrogen is recycled. Because the hydrogen in the fresh feed contains 1.0 mol% CO as an impurity, some of the unreacted hydrogen must be purged. Calculate the flow rate and the composition of the purge stream required to limit the CO2 in the reactor feed to 4.5 mol% if the ratio of recycle to fresh feed is 5:1 on a molar basis. Fresh Feed 99% Hz 1% CO Purge H CO 95.5% H 4.5% CO Condenser Reactor 1000 kg/h Fe03 Fe HO