펄프종이기술 (Journal of Korea Technical Association of The Pulp and Paper Industry)

한국펄프종이공학회 (Korea Technical Association of the Pulp and Paper Industry)
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기체-액체 혼합조건에 따른 Engineered PCC의 형태학적 분석

Morphological Analysis of Engineered PCC by Gas-Liquid Mixing Conditions

  • 이태주 (국민대학교 삼림과학대학 임산생명공학과) ;
  • 서진호 (국민대학교 삼림과학대학 임산생명공학과) ;
  • 김형진 (국민대학교 삼림과학대학 임산생명공학과)
  • Lee, Tai-Ju (Dept. of Forest Products & Biotechnology, Kookmin University) ;
  • Seo, Jin-Ho (Dept. of Forest Products & Biotechnology, Kookmin University) ;
  • Kim, Hyoung-Jin (Dept. of Forest Products & Biotechnology, Kookmin University)
  • 투고 : 2011.09.05
  • 심사 : 2011.09.22
  • 발행 : 2011.09.30
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초록

Precipitated calcium carbonate(PCC), particularly calcite crystal, is extensively used as a pigment, filler or extender in various industries such as paper, paint, textile, detergents, adhesives, rubber and plastics, food, cosmetics, and biomaterials. PCC is conventionally produced through the gas-liquid carbonation process, which consists on bubbling gaseous $CO_2$ through a concentrated calcium hydroxide slurry. This study is aimed to find some factors for controlling the morphology of engineered PCC in lab-scaled mixing batch. The experimental designs were based on temperature variables, $Ca(OH)_2$ concentration, $CO_2$ flow rate, and electrical conductivity. The model of engineered PCC morphology was finally controlled by adjustment of electrical conductivity(6.0~7.0 mS/cm) and $Ca(OH)_2$ concentration(10 g/L). Orthorhombic calcite crystals were mostly created at high concentration and electrical conductivity conditions because the increased ratio of $Ca^{2+}$ and $CO{_3}^{2-}$ ions affects the growth rate of orthorhombic faces. Excess calcium spices were contributed to the growth of faces in calcium carbonate crystal, and the non-stoichiometric reaction was occurred between $Ca^{2+}$ and $CO{_3}^{2-}$ ions during carbonation process.

키워드

참고문헌

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