CO2 fixation by Ca(OH)2 at high temperature

Abstract

Carbon dioxide gas in a 10% CO2-90% N2 mixture was fixed with Ca(OH)2 granules under a dry condition between 100 and 800 °C. The fraction of fixed CO2 was highest between 500 and 600 °C. More than 90% CO2 was fixed under the controlled gas flow rate, weight of Ca(OH)2, temperature and time. The porous CaO particles, which were prepared by dehydration of Ca(OH)2, reacted with CO2 gas and CaCO3 was formed on the surface of CaO particles. The CO2 recovery system using Ca(OH)2 makes possible to CO2 fixation by the use of simple equipment and method, and this system is effective for the minor factory.