Editing Haber process (section)

=== Pressure/temperature ===
The steam reforming, shift conversion, [[carbon dioxide removal]], and [[methanation]] steps each operate at absolute pressures of about 25 to 35 bar, while the ammonia synthesis loop operates at temperatures of {{Convert|300-500|C|abbr=on}} and pressures ranging from 60 to 180 bar depending upon the method used. The resulting ammonia must then be separated from the residual hydrogen and nitrogen at temperatures of {{Convert|-20|C|abbr=on}}.<ref name=":0">{{Cite web |last=Koop |first=Fermin |date=2023-01-13 |title=Green ammonia (and fertilizer) may finally be in sight -- and it would be huge |url=https://www.zmescience.com/science/green-ammonia-and-fertilizer-may-finally-be-in-sight-and-it-would-be-huge/ |access-date=2023-03-21 |website=ZME Science |language=en-US}}</ref><ref name="Appl" />