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At least the fossil-free steel is reduced with green hydrogen made through on-site electrolysis. That means a local hydrogen store can act as an energy buffer o
by ginko 5y ago
At least the fossil-free steel is reduced with green hydrogen made through on-site electrolysis. That means a local hydrogen store can act as an energy buffer offsetting some of the fluctuations in the grid.
- lstodd 5y agoThat is interesting. As you must know, steel is an alloy of iron and carbon, the carbon in question coming from, you know, coal. So how exactly it can be "fossil-free"?
- alkonaut 5y agoFossil free steel is steel produced by not burning carbon in the process. It simply means it doesn’t burn fossil fuels and emit (fossil) CO2. Carbon can still be used for the alloy itself. That’s not an environmental problem.
- adrianN 5y ago"fossil free steel" is a marketing term which means that (fossil) carbon is no longer used for reduction and process heat. This accounts for the vast majority of the carbon needed in steel production.
- Jolter 5y agoCarbon that is absorbed into the alloy will stay there for a long time. Until the metal rusts away completely, which is ideally decades at least. But you’re right that it’s not stored indefinitely, it does go into the atmosphere eventually.