Abstract
The formation of MgCO3·3H2O in the CO2 mineralization system was investigated using Mg(OH)2 as an intermediate at 20 °C. Liquid and solid analyses were done for qualitative and quantitative composition characterizations of the reacted samples. Results showed that the morphology of Mg(OH)2 had an obvious effect on the growth rate, size and morphology of MgCO3·3H2O. The formation of MgCO3·3H2O might be explained by the dissolution–recrystallization mechanism. Larger bundle-like MgCO3·3H2O which composed of middle-binding rod crystals was obtained from the plate-like Mg(OH)2. These findings could pave the way for controllable crystallization of MgCO3·3H2O in a CO2 mineralization system.
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