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In a typical ammonia producing plant using natural gas feedstock, a Steam Methane Reformer (SMR) is used to convert the natural gas to syngas, which is a mixture of mostly H2 and CO. The CO is then converted into additional H2 and CO2 using Water-Shift (WS) reactors. Subsequent syngas processing purifies the syngas by removing the CO2 via a CO2 absorber followed by the methanation of any remaining CO2 (which is a poison for the catalyst used to synthesize NH3). The N2 from an air separation unit is combined with the H2 and reacted via the Haber-Bosch process in an ammonia conversion reactor. There are several streams that are typically analyzed in real-time for control and optimization of the main process units. However these streams can present challenges to traditional gas analyzers. The Optograf™ Analyzer offers a robust solution for these challenging streams.

Typical Ammonia Plant

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Application Notes
A table of downloadable application notes will appear if you rotate your device to landscape mode.
  Stream Service Key Measurement
Application Note  
0 Ammonia Production Analytics Overview   AM0
1 Natural Gas Feed to Primary Reformer Carbon Content AM1
2 Fuel Gas to Reformer Furnaces BTU AM2
3 Raw Syngas - Primary Reformer Outlet Composition / CH4 AM3
4 Raw Syngas - Secondary Reformer Outlet Composition / CO AM4
5 High Temperature Shift Converter Outlet  Composition / CO AM5
6 Low Temperature Shift Converter Outlet  Composition / CO2 AM6
7 CO2 Absorber Outlet - Methanathor Inlet Composition / CO2 AM7
8 Methanator Outlet - Purified Syngas Composition / H2 / N2 AM8
9 Ammonia Converter Feed System H2 / N2 Ratio AM9
10 Ammonia Converter Exit Stream Composition / Impurities AM10
11 Synthesis Loop Purge Gas CH4 Impurity AM11