Blue hydrogen is produced from natural gas with CCS to capture CO2.

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Study for the Energy Resources Test. Dive into fossil fuels, renewable sources, and the latest in energy tech with flashcards and multiple-choice questions. Each question includes hints and explanations. Prepare effectively for your exam!

Multiple Choice

Blue hydrogen is produced from natural gas with CCS to capture CO2.

Explanation:
Hydrogen color designations reflect how the hydrogen is produced and its CO2 emissions. Blue hydrogen comes from natural gas processed by steam methane reforming with carbon capture and storage to trap the CO2. Because the CO2 is captured and stored rather than released, this route has a much lower CO2 footprint than unabated reforming, which is why it’s called blue hydrogen. This differs from green hydrogen, which is produced by electrolysis powered by renewable electricity and has near-zero direct emissions. Hydrogen from coal without CCS is typically gray (high CO2), and biomass pathways are usually treated as renewable hydrogen (though CCS could shift its classification). The described production method matches the standard blue hydrogen definition.

Hydrogen color designations reflect how the hydrogen is produced and its CO2 emissions. Blue hydrogen comes from natural gas processed by steam methane reforming with carbon capture and storage to trap the CO2. Because the CO2 is captured and stored rather than released, this route has a much lower CO2 footprint than unabated reforming, which is why it’s called blue hydrogen. This differs from green hydrogen, which is produced by electrolysis powered by renewable electricity and has near-zero direct emissions. Hydrogen from coal without CCS is typically gray (high CO2), and biomass pathways are usually treated as renewable hydrogen (though CCS could shift its classification). The described production method matches the standard blue hydrogen definition.

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