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Reduction of carbon dioxide (CO 2 ) emissions into the atmosphere is a key challenge to mitigate the anthropogenic greenhouse effect. CO 2 emissions cause lots of problems for the health of humans and increase global warming, in which CO 2 uptake decreases these environmental issues. The mineral carbonation process is an alternative method during which industrial wastes rich in calcium (Ca) or magnesium (Mg) react with CO 2 to form a stable carbonate mineral. In this research, the feasibility of CO 2 mineral carbonation by the use of red gypsum, as a Ca-rich source, was evaluated using an autoclave mini reactor. Wide-range conditions of procedure variables, such as reaction temperature, reaction time, CO 2 pressure, and liquid/ solid ratio, on the rate of mineral carbonation were studied. The results showed that the maximum conversion of Ca (98.8%) is obtained at the condition that has an optimum amount of these variables. Moreover, the results confirmed that red gypsum has high potential to form calcium carbonate (CaCO 3 ) during the process of CO 2 mineral carbonation. It was concluded that the mineral carbonation process using red gypsum can be considered to be an interesting, applicable, and low-cost method in industry to mitigate a considerable amount of CO 2 from the atmosphere, which is the main issue in the current and coming years.