Mineral carbonation of flue gas desulfurization gypsum for CO2 sequestration

▸ FGD gypsum is a promising material for CO2 sequestration by mineral carbonation. ▸ The carbonation rate is about 95% at room temperature and atmospheric pressure. ▸ High-purity calcium carbonate (above 90%) can be obtained within 10 min ▸ Coal-fired flue gas can be directly used in the gypsum carbonation process.