892 / 2024-09-19 18:35:47
Enhancing CO2 storage and marine carbon sink based on seawater mineral carbonation
seawater mineral carbonation; CO2 storage technology; ocean chemical carbon sequestration technology; marine carbon sink; carbon sequestration materials
Session 33 - Ocean Negative Carbon Emissions
Abstract Accepted
Shanshan Liu / Institute of Oceanography, Chinese Academy of Sciences (IOC)
Xuegang Li / Institute of Oceanography, Chinese Academy of Sciences (IOC)
Jinming Song / Institute of Oceanography, Chinese Academy of Sciences (IOC)
Human activities emitting carbon dioxide (CO2) have caused severe greenhouse effects and accelerated climate change, making carbon neutrality urgent. Seawater mineral carbonation technology offers a promising negative emission strategy. This work investigates current advancements in proposed seawater mineral carbonation technologies, including CO2 storage and ocean chemical carbon sequestration. CO2 storage technology relies on indirect mineral carbonation to fix CO2, involving CO2 dissolution, Ca/Mg extraction, and carbonate precipitation, optimized by adding alkaline substances or using electrochemical methods. Ocean chemical carbon sequestration uses natural seawater for direct mineral carbonation, enhanced by adding specific materials to promote carbonate precipitation and increase CO2 absorption, thus enhancing marine carbon sinks. This study evaluates these technologies' advantages and challenges, including reaction rates, costs, and ecological impacts, and analyzes representative materials' carbon fixation potential. Literature indicates that in the coming decades, seawater mineral carbonation can play a significant role in CO2 storage and enhancing marine carbon sinks.