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Energies 2015, 8(10), 12304-12313; doi:10.3390/en81012304

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

Korea Institute of Geoscience and Mineral Resources, 124 Gwahak-ro, Yuseong-gu, Daejeon 305350, Korea
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Academic Editor: Vijay Kumar Thakur
Received: 18 August 2015 / Revised: 18 October 2015 / Accepted: 19 October 2015 / Published: 27 October 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. View Full-Text
Keywords: carbonate mineralization; CO2 fixation; CaCO3; particle size; specific surface area; microbubble carbonate mineralization; CO2 fixation; CaCO3; particle size; specific surface area; microbubble
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Bang, J.-H.; Song, K.; Park, S.; Jeon, C.W.; Lee, S.-W.; Kim, W. Effects of CO2 Bubble Size, CO2 Flow Rate and Calcium Source on the Size and Specific Surface Area of CaCO3 Particles. Energies 2015, 8, 12304-12313.

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