Kinetics of Calcium Carbonate (CaCO3) Precipitation from a Icel-Yavca Dolomite Leach Solution by a Gas (Carbon Dioxide)/Liquid Reaction
✍ Scribed by Mehmet Yildirim; Huseyin Akarsu
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- German
- Weight
- 407 KB
- Volume
- 92
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
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The effects of time, CO~2~‐gas‐injection pressure, and bulk temperature on the precipitation of Ca^2+^ ions as a precipitated calcium carbonate (PCC) from a dolomite leach solution were investigated. Precipitation periods from 1 to 7 min were examined, and experiments were run at CO~2~‐injection pressures of 200–800 kPa. Effects of bulk temperature were studied in the range from 40 to 70°, and precipitation rates of PCC were determined by measuring the Ca^2+^ concentrations in the initial and effluent solutions. Influences of these parameters on the subsequent incorporation of Mg^2+^ ions with the precipitate are discussed in detail. Kinetic analysis of the precipitation was performed by considering the rates as a function of CO$\rm{ {_{3}^{2-}}}$‐ion concentrations. Results obtained by this process clearly show that Ca^2+^ ions in the solution can successfully be precipitated as a calcium carbonate product containing 54.70% of CaO and 0.77% MgO, at the rate of 2.01 mM h^−1^.