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Elizabeth Murray's avatar

You're absolutely right. "Blue hydrogen" refers to hydrogen produced from natural gas with carbon capture and storage (CCS), where the carbon emissions are captured and stored, resulting in a lower carbon footprint compared to gray hydrogen, which is produced from natural gas without CCS and emits CO2 directly into the atmosphere. It's important to distinguish between these terms when discussing hydrogen production methods and their environmental impacts.

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Seb Kennedy's avatar

Great post. One minor point: hydrogen produced from gas with carbon capture is blue, not gray. Gray hydrogen is when the CO2 from steam methane reformation is vented off

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