Mineral Carbonation as a sequestration method of CO2

The whole world has received a written warning about the miserable natural calamity due to the change of ecology and climate from Nature. Although it is certain that such result is contributed to human activity, human, paradoxical as it may seem, has the mission having to recover into the normal nature environment. With the crisis consciousness, the presidents of all countries were gathered in Japan, December 1997, and adopt the Kyoto Protocol that each country has to reduce the content of greenhouse gas. The Protocol contains the obligate reduction of the six greenhouse gases including CO2. The content of CO2 is highest among greenhouse gases, and then various kinds of methods on the capture and the storage of CO2 gas have been developed. Especially, mineral carbonation, the return technology of CO2 into the Nature as a generating source, has been studied by advanced countries. Accordingly, the concept of mineral carbonation and the previous research results are summarized and described in this paper.