| Ca(OH)2-CH3OH-H2O-CO2계에서 바테라트의 생성에 미치는 반응온도의 영향 |
| 박종력, 최상근, 김병곤, 이재창1 |
한국지질자원연구원 자원활용연구부
1강원대학교 지구환경시스템공학부 |
| Effect of Temperature on the Formation of Vaterite in Ca(OH)2-CH3OH-H2O-CO2 System |
| Jong-Lyuck Park, Sang-Kuen Choi, Byoung-Gon Kim, Jae-Jang Lee1 |
Minerals & Meterails Processing Division, Korea Institute of Geoscience and Mineral Resources
1Department of Geosystem Engineering, Kangwon National University |
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| ABSTRACT |
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Precipitated calcium carbonate is one of the most versatile mineral fillers and is consumed in an wide range of products including paper, paint, plastics, rubber, textiles, sealants, adhesives and printing ink and can be produced by several methods. Calcium carbonate has three isomorphism; vaterite, aragonite and calcite, with numerous variations of morphology in the natural mineral or organism. Formation process of vaterite in the reaction of system $Ca(OH)_2-CH_3OH-H_2O-CO_2$ were investigated by measuring the electrical conductivity, $Ca^{2+}$ ion concentration, pH in the slurries and by means of X-ray diffraction and electron microscopic observation. It was clearly established that the reaction temperature is important variable in the carbonation process; in general over 50${circ}C$, the vaterite was precipitated with the calcite and aragonite. SEM and XRD observations revealed that the vaterite formation could be prepared the temperature range of 40 to 50${circ}C$ and mean size of particles in this range is controlled from 0.5 to 0.8 ${mu}m$. |
| Key words:
Vaterite, Calcite, Aragonite, Carbonation process, Calcium carbonate |
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