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Blue hydrogen is a high-emissions form of hydrogen produced using steam methane reforming with carbon capture

Blue hydrogen is produced using steam methane reforming but with the addition of point source carbon capture.1 Carbon capture technologies capture some of the carbon dioxide produced during production and store it in geological formations. Proponents of blue hydrogen claim it is a sustainable alternative to gray hydrogen, but blue hydrogen still produces a significant amount of greenhouse gas emissions.

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Footnotes​

  1. Marchant, N. (2021, July 27). Grey, Blue, Green – the Many Colours of Hydrogen Explained. World Economic Forum. https://www.weforum.org/agenda/2021/07/clean-energy-green-hydrogen/. ↩