Specific surface area and particle size of calcium carbonate precipitated by carbon dioxide microbubbles

Bang, Jae-Wook; Jang, Young-Nam; Kim, Wonbaek; Song, Kyung Soon; Jeon, Chi Wan; Chae, Soo Chun; Lee, Seung-Woo; Park, So-Jin; Lee, Myung Gyu

doi:10.1016/j.cej.2012.05.081

Cited by 59 publications

(26 citation statements)

References 26 publications

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“…Figure 4 shows the effect of the CO2 injection rate on the SSA for both the MBG and AD. The SSA of the particles from the gypsum suspension after the MBG process (black squares (□) in Figure 4 [11]. This result agrees with the PS data in the sense that the SSA values are almost constant when using the MBG, regardless of the calcium source.…”

Section: Resultssupporting

confidence: 79%

“…The average PS was 2.6 ± 0.8 μm [11]. It is interesting that the size of the CaCO3 particles was almost the same regardless of the type of calcium source, when the MBG was used for either the CM or the PCC method.…”

Section: Resultsmentioning

confidence: 77%

“…The horizontal axis indicates the CO2 injection rate into the calcium-source suspensions. The PS results using Ca(OH)2 are from our previous paper [11]. The values in blue triangles are from reference [4] when 101-160 µm bubbles were used, and these are approximate values.…”

Section: Resultsmentioning

confidence: 99%

“…The images of the particles were obtained using a Field Emission Scanning Electron Microscope (FE-SEM) (S4700, Hitachi, Japan) located at Korea Basic Science Institute (KBSI) Jeonju Center. The PS and SSA of the particles presented here for the PCC method were from previous research [11].…”

Section: Characterizationmentioning

confidence: 99%

“…Additionally, the effect of CO2 bubble size of larger bubbles from an air diffuser (AD) and tiny bubbles from MBG on the PS and SSA was estimated by the results from the experiments and the reference [4]. The PS and SSA results presented here for the PCC method are from our previous research [11]. The results from the current study should be useful for designing a CM process to achieve two aims: effective CO2 fixation, and production of CaCO3 with properties useful for industrial use.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2015

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Abstract:The effects of CO2 flow rate and calcium source on the particle size (PS) and specific surface area (SSA) of CaCO3 particles were evaluated using microbubble generator (MBG) and air diffuser (AD) systems. The carbonate mineralization (CM) and precipitated calcium carbonate (PCC) methods were employed to produce CaCO3 using gypsum and Ca(OH)2 as the calcium sources, respectively. The CaCO3 particles prepared using the MBG were smaller (with larger specific surface area) than those obtained using the conventional AD, regardless of the calcium source. The average PSs were 2-3 and 7-9 μm for the MBG and AD systems, respectively. Moreover, the PS and SSA of the particles prepared using the MBG were not greatly affected by the CO2 injection rate. This study clearly demonstrates that the use of an MBG ensures the stable production of fine CaCO3 particles using various calcium sources and a wider range of CO2 flow rates.

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Section: Resultssupporting

confidence: 79%

Section: Resultsmentioning

confidence: 77%

Section: Resultsmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2015

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Numerical Simulation of Industrial Dry Flue‐Gas Desulfurization Processes

Klaka

Kaiser

Barbe

2018

Chemie Ingenieur Technik

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Rauchgase aus Kohlekraftwerken enthalten beträchtliche Mengen an Schwefeldioxid, die für die Umwelt dramatische Folgen haben können. Die richtige Auslegung von Entschwefelungsverfahren ist entscheidend und beruht überwiegend auf empirischen Ansätzen. Um die Belastbarkeit und die Zuverlässigkeit des Auslegungsverfahrens zu verbessern, wurde ein Rechenmodel für die trockene Entschwefelung von Rauchgasen mit Partikeln auf Calciumbasis entwickelt. Der detaillierte Aufbau wird beschrieben und die Berechnungsergebnisse mit Prozessdaten aus einem Steinkohlekraftwerk verglichen. Anschließend wurde exemplarisch eine Sensitivitätsanalyse durchgeführt.

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Lab‐scale atmospheric CO₂ absorption for calcium carbonate precipitation in sand

et al. 2019

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The microbial‐induced calcite precipitation (MICP) process for ground improvement uses microorganisms to hydrolyze urea, producing carbonate ions to induce in situ calcium carbonate (CaCO3) precipitation in soil to improve its strength. This paper proposes using the hydroxide‐based absorption of CO2 instead to provide the carbonate ion source. This study utilizes direct air capture (DAC) to absorb atmospheric CO2 using potassium hydroxide (KOH) in a semi‐batch bubble absorption column. Potassium carbonate (K2CO3) was then injected into sand with calcium hydroxide (Ca(OH)2 as a calcium source to precipitate CaCO3 and regenerate KOH. Batch and continuous flow precipitation methods produced a poor distribution of CaCO3, with more CaCO3 precipitated on top, resulting in unconfined compressive strength (UCS) of 6.9 to 19.6 kPa. Sand pre‐mixed with Ca(OH)2 gave well distributed CaCO3, precipitated throughout the sample with 7.56 wt% and 6.87 wt% CaCO3 content and UCS of 39.2 and 35.3 kPa before failing for batch and continuous flow precipitation respectively. This differs from MICP strength improvement of 1000 kPa with 5.3 wt% CaCO3 due to poor binding of sand with the precipitated CaCO3 crystals. However, this application provides a stable sequestration source for atmospheric CO2 in soil. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Specific surface area and particle size of calcium carbonate precipitated by carbon dioxide microbubbles

Cited by 59 publications

References 26 publications

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

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

Numerical Simulation of Industrial Dry Flue‐Gas Desulfurization Processes

Lab‐scale atmospheric CO₂ absorption for calcium carbonate precipitation in sand

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Specific surface area and particle size of calcium carbonate precipitated by carbon dioxide microbubbles

Cited by 59 publications

References 26 publications

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

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

Numerical Simulation of Industrial Dry Flue‐Gas Desulfurization Processes

Lab‐scale atmospheric CO2 absorption for calcium carbonate precipitation in sand

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Lab‐scale atmospheric CO₂ absorption for calcium carbonate precipitation in sand