CaCO3 decomposition for calcium-looping applications: Kinetic modeling ...
网页2020年11月1日 · A Langmuir-Hinshelwood mechanistic model, which included the decomposition of CaCO 3, the desorption of CO 2 and the CaO* relaxation fitted well the reaction rate values leading to an activation energy of 210 kJ/mol and the pre-exponential factor equal to 18,860 kmol/ (m 2 s).
Crystallization of Calcium Carbonate: Modeling Thermodynamic ...
网页2022年9月6日 · Calcium carbonate (CaCO 3) crystallization is a complex operation due to the diverse thermodynamic and kinetic factors involved during the particle formation of vaterite, aragonite, and calcite. This article involves the experimental and computational study of CaCO 3 crystallization in the presence of Mg 2+, Ba 2+, and Sr 2+.
A Multifaceted Kinetic Model for the Thermal Decomposition of Calcium …
网页2020年9月22日 · The proposed model was verified using the thermal decomposition experiment on calcium carbonate. The equation has been modified as fα=n1−α1−1n−ln1−α−1m1−ψln1−α12. This led to the conclusion that the pore structure, generated during the thermal decomposition of calcite, has an important influence on the decomposition kinetics.
Geometrically frustrated interactions drive structural complexity in ...
网页2023年9月25日 · The empirical model parameters for amorphous calcium carbonate take values known to promote structural complexity. We thus show that both the complex structure and its resilience to...
Effects in the solubility of CaCO3: Experimental study and model ...
网页2012年6月25日 · The solubility of calcium carbonate was experimentally determined in aqueous solution at different ionic strengths and temperature. Pure calcium carbonate and sodium chloride reagent grade ACS, provided by SCHARLAB, were used. The solutions were prepared with deionized and ultrapure water (Milli Q).
The nano- and meso-scale structure of amorphous calcium carbonate
网页2022年4月27日 · Here, using Monte Carlo simulations constrained by X-ray and neutron scattering data together with model building, we demonstrate a method for determining the structure of these intermediates...
Structural transitions of calcium carbonate by molecular …
网页Calcium carbonate (CaCO 3) plays a crucial role in the global carbon cycle, and its phase diagram has always been of significant scientific interest. In this study, we used molecular dynamics (MD) to investigate several structural phase transitions of calcium carbonate.
Thermodynamic modelling of CaCO3 polymorphs during CO2 …
网页2023年7月15日 · In this study, a thermodynamic model is established to simulate the formation of different calcium carbonate polymorphs during the aqueous carbonation of Portland cement. The proportion of different calcium carbonate polymorphs in aqueous carbonation system is calculated.
Calcium carbonate decomposition - Journal of Thermal Analysis …
网页2012年3月9日 · Calcium carbonate decomposes under well-defined conditions giving CaO (solid) and CO 2 (gas). The process kinetics are known to be strongly influenced by the CO 2 partial pressure and temperature.
Comparative Kinetic Analysis of CaCO3/CaO Reaction System …
网页In this paper, the calcination of synthesized CaCO 3 is modeled using model-fitting methods under two different experimental atmospheres, including 100% CO 2, which realistically reflects reactor conditions and is relatively unstudied kinetically.
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