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Measurements in Geochemical Carbon Dioxide Removal

SUMMARY Geochemical carbon dioxide removal (CDR) technologies capture and store carbon dioxide (CO2) from the atmosphere using alkaline materials that are rich in calcium (Ca) and magnesium (Mg). Alkaline materials include natural rocks such as basalt, industrial by-products such as steel slag, or artiicially generated and industrially produced materials such as lime. Geochemical CDR technologies speed up the reactions of such materials with air or other CO2-bearing gases, and convert the CO2 into solid carbonate minerals or dissolved inorganic carbon in the ocean. Gigatonne (Gt) scale removal is potentially possible with geochemical CDR owing to ...