Reactive CaCO<sub>3</sub> Formation from CO<sub>2</sub> and Methanolic Ca(OH)<sub>2</sub> Dispersions: Transient Methoxide Salts, Carbonate Esters and Sol-Gels.
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ABSTRACT: A combination of ex situ and in situ characterization techniques was used to determine the mechanism of calcium carbonate (CaCO3) formation from calcium hydroxide (Ca(OH)2) dispersions in methanol/water (CH3OH/H2O) systems. Mid-infrared (mid-IR) analysis shows that in the absence of carbon dioxide (CO2) Ca(OH)2 establishes a reaction equilibrium with CH3OH, forming calcium hydroxide methoxide (Ca(OH)(OCH3)) and calcium methoxide (Ca(OCH3)2). Combined ex situ mid-IR, thermogravimetric analysis (TGA), X-ray diffraction (XRD), X-ray absorption spectroscopy and scanning electron microscopy examination of the reaction product formed in the presence of CO2
SUBMITTER: Kathyola TA
PROVIDER: S-EPMC11447961 | biostudies-literature | 2024 Sep
REPOSITORIES: biostudies-literature
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