The Study of Metal Oxide Modified Limestone As CO2 Sequestration Materals

Many scientists have devoted themselves to CO₂ sequestration research because of the global warming. Limestone can be used for CO₂ sequestration in cement industry and had been widely reported. But the surface “sintering” of limestone during the recycling will was dramatically decrease its efficiency. So here we use some metal oxides such as MgO or Fe₂O₃ to modify the morphology of the limestone particles thus to increase the CO₂ sequestration capability of limestone. The efficiency can be increased over 8% after adding 1% MgO particles. The mechanism and the morphology changes have been proved with SEM, optical microscope, XRD, etc.