| Popis: |
The aim of this chapter is to relate the detailed analysis of the ammonia synthesis reaction, as examined in other sections of this book, to the commercial operation of one of the major processes of the worldwide chemical industry. The present annual production of ammonia is in excess of 120 million tons per year and virtually all of this ammonia is produced from a mixture of hydrogen and nitrogen over a promoted iron catalyst operating at elevated temperature and pressure. Over 90% of ammonia produced is used as a fertilizer, principally in the form of urea or ammonium nitrate. |
