Effects of CO2 Bubble Size, CO2 Flow Rate and Calcium Source on the Size and Specific Surface Area of CaCO3 Particles

Bang, Jae-Wook; Song, Kyung Soon; Park, Sang Won; Jeon, Chi Wan; Lee, Seung-Woo; Kim, Wonbaek

doi:10.3390/en81012304

Cited by 16 publications

(10 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The primary particle size of the CaCO3 also gradually increased with an increase of the CO2 flow rate at a low Ca(OH)2 concentration, but the tendency became weak at high Ca(OH)2 concentration. They also revealed that the CO2 bubble size also affected the particle size and specific surface area (Bang et al, 2015).…”

Section: Effect Of Other Factors On the Formation Of Caco3 Polymorphsmentioning

confidence: 99%

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

et al. 2017

View full text Add to dashboard Cite

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.

show abstract

Section: Effect Of Other Factors On the Formation Of Caco3 Polymorphsmentioning

confidence: 99%

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

et al. 2017

View full text Add to dashboard Cite

show abstract

“…A jacket reactor was used for CO2 mineralization, with a coolant at 1 °C being circulated between the walls by a chiller, and a lid being placed on the upper part of the reactor. As CO2 microbubbles were injected into the suspension using a microbubble generator, the pH decreased rapidly, as has already been shown in the literature [7,26,27]. CO2 injection was stopped once the pH of the brine had decreased to 8.…”

Section: Methodsmentioning

confidence: 87%

CO2 Mineralization Using Brine Discharged from a Seawater Desalination Plant

et al. 2017

Self Cite

View full text Add to dashboard Cite

CO 2 mineralization is a method of sequestering CO 2 in the form of carbonated minerals. Brine discharged from seawater desalination is a potential source of Mg and Ca, which can precipitate CO 2 as forms of their carbonate minerals. The concentration of Mg and Ca in brine are twice those in the seawater influent to desalination process. This study used a cycle for CO 2 mineralization that involves an increase in the pH of the brine, followed by CO 2 bubbling, and, finally, filtration. To the best of our knowledge, this is the first time that non-synthesized brine from a seawater desalination plant has been used for CO 2 mineralization. The resulting precipitates were CaCO 3 (calcite), Mg 5 (CO 3 ) 4 (OH) 2 ·4H 2 O (hydromagnesite), and NaCl (halite) with these materials being identified by X-ray Diffraction (XRD), Fourier transform infrared (FTIR) and thermo gravimetric-differentail thermal Analysis (TGA)-DTA. Despite the presence of Ca with Mg in brine being unfavorable for the precipitation of Mg carbonate, Mg reacted with CO 2 to form hydromagnesite at a yield of 86%. Most of the Ca formed calcite, at 99% yield. This study empirically demonstrates that brine from seawater desalination plants can be used for CO 2 mineralization.

show abstract

“…In addition, even though the CaCO3 precipitate consisted of a large amount of Mn, Mn-doped crystals (e.g., Mn·Ca(CO3)2) or MnCO3 was not formed in the three CaCO3 crystal phases. The CaCO3 obtained herein can be utilized as an industrial material, e.g., as a paper-making filler, because the shape and size distribution of the obtained CaCO3 herein can enhance the smoothness of paper surfaces, as well as printing quality [36]. Other metal ions, such as Mg, Al, and Ti were not supposed to form crystalline minerals.…”

Section: Co 2 Mineralization Of Ca Leached From Bfsmentioning

confidence: 97%

Leaching of Metal Ions from Blast Furnace Slag by Using Aqua Regia for CO2 Mineralization

et al. 2016

Self Cite

View full text Add to dashboard Cite

Blast furnace slag (BFS) was selected as the source of Ca for CO 2 mineralization purposes to store CO 2 as CaCO 3 . BFS was dissolved using aqua regia (AR) for leaching metal ions for CO 2 mineralization and rejecting metal ions that were not useful to obtain pure CaCO 3 (as confirmed by XRD analysis). The AR concentration, as well as the weight of BFS in an AR solution, was varied. Increasing the AR concentration resulted in increased metal ion leaching efficiencies. An optimum concentration of 20% AR was required for completely leaching Ca and Mg for a chemical reaction with CO 2 and for suppressing the leaching of impurities for the production of high-purity carbonate minerals. Increasing the liquid-to-solid ratio (L/S) resulted in the increased leaching of all metal ions. An optimum L/S of 0.3/0.03 (=10) was required for completely leaching alkaline-earth metal ions for CO 2 mineralization and for retaining other metal ions in the filtered residue. Moreover, the filtrate obtained using 20% AR and an L/S of 0.3/0.03 was utilized as Ca sources for forming carbonate minerals by CO 2 mineralization, affording CaCO 3 . The results obtained herein demonstrated the feasibility of the use of AR, as well as increasing pH, for the storage of CO 2 as high-purity CaCO 3 .

show abstract

Effects of CO2 Bubble Size, CO2 Flow Rate and Calcium Source on the Size and Specific Surface Area of CaCO3 Particles

Cited by 16 publications

References 22 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

CO2 Mineralization Using Brine Discharged from a Seawater Desalination Plant

Leaching of Metal Ions from Blast Furnace Slag by Using Aqua Regia for CO2 Mineralization

Contact Info

Product

Resources

About