A fresh feed stream containing 4.0 mol% inert gas and a stoichiometric ratio of hydrogen and nitrogen is combined with a recycle stream and is fed to a system to produce ammonia according to the reaction:
N2 + 3H2 = 2NH3
The single pass conversion in the reactor is 20 % (moles N2 reacted per mole of N2 fed to the reactor). The gas leaving the reactor goes to a condenser where all the ammonia is recovered. Ten (10) percent of the unreacted gas stream is purged from the system, and the remainder is recycled, mixed with fresh feed and fed to the reactor. Calculate:
The overall conversion of fresh N2.
The moles recycled per mole of fresh feed