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H2 Production

The majority of captive hydrogen is produced in refineries via Steam Methane Reforming of natural gas inside the refinery battery limits (ISBL). The output of the reformer is syngas, primarily a mixture of H2 and CO. The CO in the syngas is converted into CO2 and additional H2 using Water-Shift converters. Further processing purifies the syngas by removing CO2 via a CO2 absorber. In most refineries, Pressure Swing Adsorption (PSA) units play a major role in the final H2  purification process. Many of these gas streams contain high levels of steam, and the process conditions are severe enough to require special sample conditioning techniques. The Optograf™ Analyzer and integrated sampling interfaces address these sampling and analysis challenges.

Typical Hydrogen Plant

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Application Notes
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  Stream Service Key Measurement
Parameter
Application Note  
0 Captive Hydrogen Production Analytics Overview   HH0
1 Natural Gas Feed to Primary Reformer Carbon Content HH1
2 Fuel Gas to Reformer Furnaces BTU HH2
3 Raw Syngas - Primary Reformer Outlet Composition / CH4 HH3
4 Raw Syngas - Secondary Reformer Outlet Composition / CO HH4
5 High Temperature Shift Converter Outlet   Composition / CO HH5
6 Low Temperature Shift Converter Outlet Composition / CO2 HH6
7 CO2 Absorber Outlet - Feed to PSA Composition / CO2 HH7
8 PSA Unit H2 Stream Composition / H2 / N2 HH8
9 CO2 Recovery Stream CH4 Leakage HH9