화학공학소재연구정보센터
Energy Conversion and Management, Vol.38, S461-S466, 1997
Absorption and fixation of carbon dioxide by rock weathering
The weathering of alkaline rocks, such as alkaline or alkaline earth silicate is thought to have played a great role in the historical reduction in the atmospheric CO2 of this planet, To enhance the process artificially, we should increase the surface area of the rocks. However, some additional pulverization energy is necessary, which leads to the additional CO2 emission. In the present paper, first, we reviewed the possibilities of the utilization of the reaction as a countermeasure against the CO2 problem from the view points of resources and global carbon circulation. Second, we report the experimental results on weathering kinetics conducted for various kinds of silicates. Lastly, the amounts of pulverization energy of wollastonite and olivine sand were evaluated using industrial data of their pulverization. It was concluded that the CO2 absorption by rock weathering is one of the most promissing measures for CO2 problem.