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30 Μαρ 2022 · To investigate a mechanism of reaction of nesquehonite formation (Mg(OH) 2 + CO 2 + 2H 2 O → MgCO 3 ·3H 2 O), at the first step, the simultaneous interaction of the carbonated Mg(OH) 2 cluster and the H 2 O molecule (Mg(OH) 2 + CO 2 + H 2 O) is considered.
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1 Μαρ 2020 · In addition, an antagonistic effect was observed with CO 2 ‒Mg(OH) 2 mixtures because MgO, which was generated by the thermal decomposition of Mg(OH) 2, can chemically react with water vapor and CO 2 to produce basic magnesium carbonate (xMgCO 3 ·yMg(OH) 2 ·zH 2 O), thereby reducing the CO 2 concentration in a reaction system.
Research findings lead to possible explanations based on the chemical and thermodynamical properties of the system: (i) the high energy barrier for dehydrating the Mg 2+ ·6H 2 O cations hinders the carbonation of Mg precursors, inducing a preferential formation of the hydrated magnesium carbonates polymorphs, (ii) the intrinsic structural/spatia...
25 Αυγ 2019 · The reaction mechanism in the CO 2 mineralization process. CO 2 was introduced to the obtained Mg (OH) 2 slurries with a flow rate of 100 ml min −1 at 20 °C. The composition and quantification of the species in both liquid and solid phase were analyzed.
In addition, many researchers have observed that the reaction between Mg(OH) 2 18,19,22,25 (or Ca(OH) 2 38–40) and CO 2 is intra-particle diffusion controlled, meaning that the reaction rate decreases steeply as the carbonation reaction proceeds.
3 Οκτ 2018 · In principle, MgCO 3 can be obtained via the chemical reaction, MgO + CO 2 → MgCO 3. At ambient temperature and pressure, the Gibbs free energy change of this chemical reaction is a negative ...
14 Ιουν 2023 · This work reports insights into the carbonation behavior of Mg(OH) 2 –Ca(OH) 2 (MH–CH) mixtures including the precipitation of different carbonates, degree of reaction of each phase, mechanical properties, microstructure characterization, and thermodynamic stability.
