Britannica Sources used in this answer

What pressure range is used for commercial ammonia production by the Haber-Bosch process?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Difference in molecular structure between ammonia/amines and quaternary ammonium ions — ammonia Ammonia and amines have a slightly flattened trigonal pyramidal shape with a lone pair of electrons above the nitrogen. In quaternary ammonium ions, this area is occupied by a fourth substituent.

For the commercial production of ammonia via the Haber-Bosch process, the reaction is typically carried out at pressures ranging from 200 to 400 atmospheres. While some technical contexts note a broader operational range of 100 to 1,000 atmospheres to facilitate the reaction rate and equilibrium, the 200 to 400 atmosphere range is standard for commercial applications.12

This process combines nitrogen and hydrogen using an iron-based catalyst at elevated temperatures to ensure an efficient yield.12