Precipitation of nanostructured calcite in a controlled multiphase process

Simulation of CaCO3 Crystal Growth in Multiphase Reaction

“…Higher supersaturation leads to smaller mean crystal size, since the nucleation rate is much more sensitive to the level of supersaturation than the growth rate. It agrees very well with the experiment (Kędra- Królik & Gierycz, 2006, Kędra-Królik & Gierycz, 2009 and is caused by the fact that the high level of supersaturation is accumulated within the liquid film due to the large diffusion resistance. The proposed model very well describes the CaCO 3 crystals formation in the rotating disc reactor and can be used and recommended for accurate calculation of the particle size and distribution obtained by gas-liquid precipitation in the reactor.…”

“…It happens in the Rotating Disc Precipitation Reactor (Kędra- Królik & Gierycz, 2006, Kędra-Królik & Gierycz, 2009) used for calcium carbonate production. The reaction in liquid phase goes in contact with continuously flowing gaseous carbon dioxide in the thin film formed on the surface of the rotating disc (Kędra- Królik & Gierycz, 2006, Kędra-Królik & Gierycz, 2009). This creates a constant surface area of gas-liquid interface and the carbonation reaction of lime water involves gas, liquid and solid phase.…”

Synthesis of Mesoporous CaCO3 Powder using Natural Limestone as Ca Ion Source with Solution Mixing Method

“…o C on the formation of vaterite phase, which is not significant and due to the formation of CaCO3 from CaCl2 and Na2CO3 with the same molar content, 1:1. It was also confirmed by Kedra, et al [20] and Montez, et al [21], who reported that the size, phase and morphology of CaCO3 were affected by the amount Ca 2+ dan CO3 2-ions. Moreover, the morphology of the corresponding samples is given in Fig.…”

Simulation of nucleation and growing of CaCO3 nanoparticles obtained in the rotating disk reactor

“…In the presented experiments carbonation process was performed in a multiphase system by use of the reactor with rotating discs [26,27]. A schematic diagram of the rotating disk reactor as well as the experimental gas-liquid-solid reaction system is shown in Fig.…”

“…In the literature there are many different models and simulations [19][20][21][22][23][24][25] done for different particular precipitation reactions. We have conducted the reaction in the new rotating disk precipitation reactor [26,27]. The concept is based on continuous formation of thin liquid films at a surface of rotating discs where the mass transfer proceeds in diffusion-convective way.…”