The Arcelor Mittal 3D project, launched in 2019 in Dunkirk, France, involves capturing carbon dioxide contained in the blast furnace using a chemical solvent and extracting the CO2 and reducing the pressure. This process allows the CO2 to be re-used in the furnaces or stored, and yields heat that can be used to reduce the operating costs of the furnace. The demonstration plant will be capable of capturing approximately 4,400 tons of CO2 per year from steel-mill gas.