Blue hydrogen: Steam Methane Reforming hydrogen
The CO is then reacted with steam to produce additional hydrogen and CO2. Finally, the hydrogen is separated and concentrated, typically using Pressure Swing Adsorption. The process releases significant amounts of CO2 as a by- product. In order to mitigate this, and to make the hydrogen low carbon, the CO2 must be recovered and stored using CCUS.
In the steam reforming process [18], a desulfurized hydrocarbon feedstock such as natural gas, refinery offgas, liquefied petroleum gas or naphtha, is pre- heated and mixed with steam before passing through a catalyst in a fired steam reformer to produce hydrogen, carbon monoxide (CO) and carbon dioxide (CO2).
Figure 1 [19]
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