Simultaneous ex-situ CO2 mineral sequestration and hydrogen production from olivine-bearing mine tailings

The combined method of ex-situ CO2 storage and hydrogen production proposed by this study offsets 90% of New Caledonia's annual CO2 emissions while compensating ∼10% of New Caledonia's annual energy demand. More globally, it has implications for cost effective disposal of industrial CO2 emissions and production of hydrogen gas (clean energy) at a large scale; those two processes could be combined using the residual heat provided by a third one such as the high temperature smelting of ore.