Ammonia manufacture via the Haber process Tamil revision mind map focused on the industrial plant, not the equilibrium reasoning covered separately in the Unit 12 Haber and Contact process map: sourcing nitrogen by fractional distillation of liquid air and hydrogen by steam-methane reforming of natural gas, the reactor operating at 450 degrees Celsius and 200 atmospheres over finely divided iron catalyst, the condenser that liquefies and removes ammonia from the gas stream, the recycle loop returning unreacted nitrogen and hydrogen so that a fifteen percent single-pass yield becomes a much higher overall conversion, and the fact that over eighty percent of ammonia produced goes into fertiliser and urea manufacture.