@Sibbo The hybrit process is coal-free. And yes, the sponge iron it produces is very low carbon, so it must be added back. See https://res.mdpi.com/d_attachment/metals/metals-10-00972/article_deploy/metals-10-00972.pdf for more details.
@jwildeboer Interesting thanks. So majority of coal is saved in the reduction of iron. Thanks for the link, it is a really nice paper!
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