Preparation of ultrafine calcium carbonate with micropore dispersion
Ultrafine particles of CaCO_3 were synthesized with micropore dispersion in gas-liquid (slurry) systems.Experiments was conducted on carbonation of Ca(OH)_2/H_2O system.Micropore plate was used for the dispersion of mixed gas containing CO_2.Therefore,the processes of momentum transfer, mass transfer and reaction were enhanced.The results showed that ultrafine particles with diameter about 40nm and specific surface area more than 30 m2·g -1 were prepared successfully.The crystal structure of particles was characterized with BET, FTIR and TEM.