Sample records for CALCIT (calcite)

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Rhombohedral calcite precipitation from CO2-H2O-Ca(OH)2 slurry under supercritical and gas CO2 media

Montes-Hernandez, German; Renard, François; Geoffroy, Nicolas; Charlet, Laurent; Pironon, Jacques

The formation of solid calcium carbonate (CaCO3) from aqueous solutions or slurries containing calcium and carbon dioxide (CO2) is a complex process of considerable importance in the ecological, geochemical and biological areas. Moreover, the demand for powdered CaCO3 has increased considerably rece...

DRIVER (German)


Textural properties of synthetic nano-calcite produced by hydrothermal carbonation of calcium hydroxide

Montes-Hernandez, German; Fernandez-Martinez, Alejandro; Charlet, L.; Tisserand, Delphine; Renard, F.

The hydrothermal carbonation of calcium hydroxide (Ca(OH)2) at high pressure of CO2 (initial PCO2 1/4 55 bar) and moderate to high temperature (30 and 90 1C) was used to synthesize fine particles of calcite. This method allows a high carbonation efficiency (about 95% of Ca(OH)2-CaCO3 conversion), a ...

DRIVER (German)