LAUSR

The regeneration of the CO2 capture system is the most energy-intensive process associated with CO2 capture because high temperatures are required to desorb CO2 from the absorbent. We propose a single process for effective CO2 capture and mineralization as a substitute for desorption of absorbed CO2, producing high value-added CaCO3. A saturated 2-amino-2-methyl-1-propanol (AMP) solution was used as a carbonate source, and calcium chloride (CaCl2) was used as a calcium ion source to precipitate CaCO3. A semi-batch reactor was used to investigate the effects of the mixing rate, temperature, and amount of calcium added during the CaCO3 precipitation process. During the mineralization reaction, the absorbed CO2 in AMP solution instantly converted into white CaCO3 precipitant with 97.4% conversion. The stirring rate provided a reciprocal effect on the crystal size, whereas the temperature and Ca/CO2 molar ratio appeared to affect the crystal morphology.