Evaluation of Applicability of Magnesium-Based CO2 Capture Specimens Derived from Brine

In this study, a CO 2 -sequestering specimen was fabricated and evaluated based on MgO obtained from the recovery and calcination of magnesium from brine using a pH swing method.Brucite ore was used as the control.MgO was synthesized through calcination at 500 C.The reactivity of the synthesized MgO was measured using acetic acid and citric acid methods and exhibited reaction times of 12, 24, 75, and 183s, indicating high reactivity.Subsequently, accelerated carbonation curing was performed using sodium bicarbonate as a carbonation accelerator.X-ray diffraction and Simultaneous Differential Scanning Calorimetry and Thermogravimetric Analyses of the cured specimens revealed the formation of magnesium carbonate phases in the specimens with sodium bicarbonate, which were absent in the specimens without sodium bicarbonate.Moreover, weight loss increased in the approximate range of 300-500C, confirming enhanced CO 2 sequestration.These results are expected to serve as fundamental data for the resource utilization of bitterns and desalination brines in future applications.