PRETREATMENT METHOD OF BRUCITE FOR CO2 MINERAL CARBONATION

摘要

A pre-treatment method of brucite for CO2 mineral carbonation is provided to effectively react unreacted brucite containing magnesium hydroxide with CO2 then generate carbonate by removing adsorbed water moiety, hydroxyl group and other volatile material in the brucite through the thermal treatment. The pre-treatment method includes steps of crushing brucite into granules with particle size of less than 125 micrometers possible to be heat treated(S10); homogeneously distributing the crushed granules to become thickness of less than 3cm(S20); and heat treating the processed granules at 400 to 1200deg.C for 10 minutes or more(S30). The pre-treatment method is carried out under atmosphere or a condition of introducing oxygen. As a result, various materials such as adsorbed water moiety, hydroxyl group and other volatile materials are removed from the unreacted brucite(Mg(OH)2).