Synthesis of calcium carbonate vaterite crystals and their effect on stabilization of suspension polymerization of MMA

Fuchigami, Kiyomi; Taguchi, Yoshinari; Tanaka, Masato

doi:10.1016/j.apt.2008.10.003

Cited by 26 publications

(9 citation statements)

References 16 publications

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“…The anhydrous crystalline polymorphs of CaCO3 strongly depend on the synthesis variables such as temperature, pressure, pH of the solution, reaction time, degree of supersaturation, ion concentration and ratio, ionic strength, stirring, type and concentration of additives, and feeding order (Tai and Chen, 1998;Jung et al, 2000;García-Carmona et al, 2003a,b;Shen et al, 2006;Meldrum and Cölfen, 2008;Chen and Xiang, 2009;Fuchigami et al, 2009;Ren et al, 2011;Chu et al, 2013;Zhao et al, 2013;Jiang et al, 2014;Ševčík et al, 2015;Chang et al, 2017). Although the formation of CaCO3 can be achieved by a simple precipitation reaction between Ca 2+ and CO 3 2− ions, the controllable formation of a specific polymorph of CaCO3 is still a practical challenge.…”

Section: Synthesis Variables and Their Effects On The Formation Of Camentioning

confidence: 99%

Calcium Carbonate Precipitation for CO2 Storage and Utilization: A Review of the Carbonate Crystallization and Polymorphism

et al. 2017

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The transformation of CO2 into a precipitated mineral carbonate through an ex situ mineral carbonation route is considered a promising option for carbon capture and storage (CCS) since (i) the captured CO2 can be stored permanently and (ii) industrial wastes (i.e., coal fly ash, steel and stainless-steel slags, and cement and lime kiln dusts) can be recycled and converted into value-added carbonate materials by controlling polymorphs and properties of the mineral carbonates. The final products produced by the ex situ mineral carbonation route can be divided into two categories-low-end high-volume and high-end low-volume mineral carbonates-in terms of their market needs as well as their properties (i.e., purity). Therefore, it is expected that this can partially offset the total cost of the CCS processes. Polymorphs and physicochemical properties of CaCO3 strongly rely on the synthesis variables such as temperature, pH of the solution, reaction time, ion concentration and ratio, stirring, and the concentration of additives. Various efforts to control and fabricate polymorphs of CaCO3 have been made to date. In this review, we present a summary of current knowledge and recent investigations entailing mechanistic studies on the formation of the precipitated CaCO3 and the influences of the synthesis factors on the polymorphs.

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Section: Synthesis Variables and Their Effects On The Formation Of Camentioning

confidence: 99%

Calcium Carbonate Precipitation for CO2 Storage and Utilization: A Review of the Carbonate Crystallization and Polymorphism

et al. 2017

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“…At the higher temperature of 355 K (Fig. 8 Aragonite was observed as a major polymorph of CaCO 3 at 355 K because a phase transition from vaterite to aragonite occurs at above 330 K. 47 Fig. 9 shows a comparison of the morphological structures of CaCO 3 (W) synthesized at 295 K and 355 K with their corresponding CaCO 3 (M) structures.…”

Section: Synthesis Of Morphologically Controlled Pccmentioning

confidence: 99%

Tuning the dissolution kinetics of wollastonite via chelating agents for CO2 sequestration with integrated synthesis of precipitated calcium carbonates

Zhao

Park

Lee

et al. 2013

Phys. Chem. Chem. Phys.

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Carbon mineralization has recently received much attention as one of the most promising options for CO2 sequestration. The engineered weathering of silicate minerals as a means of permanent carbon storage has unique advantages such as the abundance of naturally occurring calcium and magnesium-bearing minerals and the formation of environmentally-benign and geologically stable solids via a thermodynamically favored carbonation reaction. However, several challenges need to be overcome to successfully deploy carbon mineralization on a large scale. In particular, the acceleration of the rate-limiting mineral dissolution step along with process optimization is essential to ensure the economic feasibility of the proposed carbon storage technology. In this study, the effect of various types of chelating agents on the dissolution rate of calcium-bearing silicate mineral, wollastonite, was explored to accelerate its weathering rate. It was found that chelating agents such as acetic acid and gluconic acid significantly improved the dissolution kinetics of wollastonite even at a much diluted concentration of 0.006 M by complexing with calcium in the mineral matrix. Calcium extracted from wollastonite was then reacted with a carbonate solution to form precipitated calcium carbonate (PCC), while tuning the particle size and the morphological structure of PCC to mimic commercially available PCC-based filler materials.

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“…3,4 Therefore, understanding the vaterite growth process is important to both the materials industry and to the research of biomineralization mechanisms. 1, 2 Vaterite, a less thermodynamically stable polymorph of CaCO 3 , has been of great interest because its crystallization is strongly associated with biogenic activities and itself an important precursor in several carbonate-forming processes.…”

Section: Introductionmentioning

confidence: 99%

Growth process and crystallographic properties of ammonia-induced vaterite

Zhang

Becker

2010

MRS Proc.

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Metastable vaterite crystals were produced by increasing the pH of Ca 2+ -and CO 3 2+ -containing solutions through diffusing ammonia gas. The SEM and TEM studies indicate that this ammonia-induced vaterite is polycrystalline with a 6-fold symmetry of the crystal aggregate. The morphology and crystallographic properties of this assemblage change during crystallization. One hour after nucleation starts, vaterite grains display a spherical structure composed of nano-particles (5-10 nm) with random crystallographic orientations. After that, horizontal layers begin to develop at the edge of the sphere and gradually tilt toward the center as they grow vertically, which results in a three-dimensional morphology with a dent in the center. The vaterite grains mature fully 16 hours after nucleation. TEM analysis indicates the grown vaterite grain (50-60 µm) consists of numerous hexagonal pieces of single crystals (1-2 µm) of similar crystallographic orientations. High-resolution TEM demonstrates that these single crystals grow along (001) with {110} hexagonal boundaries.

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Synthesis of calcium carbonate vaterite crystals and their effect on stabilization of suspension polymerization of MMA

Cited by 26 publications

References 16 publications

Calcium Carbonate Precipitation for CO2 Storage and Utilization: A Review of the Carbonate Crystallization and Polymorphism

Calcium Carbonate Precipitation for CO2 Storage and Utilization: A Review of the Carbonate Crystallization and Polymorphism

Tuning the dissolution kinetics of wollastonite via chelating agents for CO2 sequestration with integrated synthesis of precipitated calcium carbonates

Growth process and crystallographic properties of ammonia-induced vaterite

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