Crystallization kinetics of calcium carbonate at a stoichiometric ratio of components
- Authors: Pochitalkina I.A.1, Kekin P.A.1, Morozov A.N.1, Petropavlovskii I.A.1, Kondakov D.F.2
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Affiliations:
- Mendeleev University of Chemical Technology
- Kurnakov Institute of General and Inorganic Chemistry
- Issue: Vol 90, No 12 (2016)
- Pages: 2346-2351
- Section: Chemical Kinetics and Catalysis
- URL: https://journals.rcsi.science/0036-0244/article/view/169012
- DOI: https://doi.org/10.1134/S0036024416120232
- ID: 169012
Cite item
Abstract
The formal kinetics of calcium carbonate crystallization in aqueous solutions is studied at a stoichiometric ratio of Ca2+ and CO32- ions. The kinetics of the process was monitored by convenient and reliable methods (complexometric analysis for calcium in an aqueous solution and energy dispersive and microscopic measurement of solid particle sizes). The effect the temperature and degree of supersaturation have on the periods of induction and mass crystallization and the equilibrium concentration of calcium ions in solution is estimated at continuously controlled pH and solution ionic strength. The kinetic parameters (n, k, τ1/2, Ea) of calcium carbonate crystallization are calculated. It is shown that calcium carbonate with a calcite structure formed at a stoichiometric ratio of reagents, and changes in the temperature (25–45°C) and the solution’s degree of supersaturation (2–6) within the considered range had no effect on the characteristics of the solid phase.
Keywords
About the authors
I. A. Pochitalkina
Mendeleev University of Chemical Technology
Author for correspondence.
Email: pochitalkina@list.ru
Russian Federation, Moscow, 125047
P. A. Kekin
Mendeleev University of Chemical Technology
Email: pochitalkina@list.ru
Russian Federation, Moscow, 125047
A. N. Morozov
Mendeleev University of Chemical Technology
Email: pochitalkina@list.ru
Russian Federation, Moscow, 125047
I. A. Petropavlovskii
Mendeleev University of Chemical Technology
Email: pochitalkina@list.ru
Russian Federation, Moscow, 125047
D. F. Kondakov
Kurnakov Institute of General and Inorganic Chemistry
Email: pochitalkina@list.ru
Russian Federation, Moscow, 119991