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A comment on Mitsubishi Heavy to build biggest zero-carbon steel plant. Parent comment

Re:Mitsubishi Heavy to build biggest zero-carbon steel plant by Hypx on Thursday December 31, 2020 @03:23PM (#25596728)
The amount of hydrogen you need for hydrogen DRI is quite small. From this source: https://www.energy.gov/sites/prod/files/2018/08/f54/fcto-h2-...

You need about 54kg of hydrogen per ton of iron. Assuming it takes 50 kWh of energy to make 1 kg of hydrogen, you get something like 2.7 kWh per kg of iron. This is significantly more energy efficient than the idea you're proposing.

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Re:Mitsubishi Heavy to build biggest zero-carbon steel plant by Gibbon1 on Thursday December 31, 2020 @07:00PM (#25598810)
Found this report from a more recent attempt.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6918249/

The Norwegian pilot plant used a crude asbestos separator for the anode and cathode. The above used some magic polymer.

They got it down to 3.53 kwh/kg

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