Accelerated Carbonation of Mineral Wastes in Fluidized Beds

Minerals with high content of silicate and rich in calcium are known to readily react with carbon dioxide (CO2). The reaction products can cause rapid hardening and derives in the production of aggregate materials which can then be used as construction materials and other valuable purposes. This paper reviews recent developments in this emerging technology and provides an insight in the use of fluidized beds as suited reactors providing good mixing and adapted space-time. The effects of the accelerated carbonation reaction on different solid particles and possible strategies to achieve adequate fluidization such as regulating phase ratios, gas-solid contact and critical film layer are considered here.