카이스트, 바닷물 이산화탄소를 돌로 바꿔 영구 저장하는 기술 개발

Translation

A research team led by Professor Dong-Yeun Koh at KAIST, working jointly with MIT in the United States, has developed "electrochemical-based ocean carbon removal (e-DOC)", a technology that converts carbon dioxide in seawater into calcium carbonate mineral and stores it permanently. The ocean is the Earth's largest carbon reservoir, absorbing about 30% of the carbon dioxide that humans have emitted. If the dissolved inorganic carbon in seawater is removed artificially, it can produce the effect of the ocean absorbing carbon dioxide from the atmosphere once again. Whereas in existing devices calcium carbonate stuck to the electrodes and degraded performance, the new "hollow fiber electrode assembly" solved this problem by changing the structure so that the mineral is formed outside the electrode. This technology removed 80-90% of the dissolved inorganic carbon. Even though it cut power consumption by up to 54% compared with existing devices, it operated stably for more than 120 hours.