침강성 탄산칼슘 합성에 영향을 미치는 변수에 관한 고찰

서지정보

ㆍ발행기관 : 한국열환경공학회 ㆍ수록지정보 : 열환경공학 / 11권 / 1호
ㆍ저자명 : 서혜민, 금영호, 이무열, 정중환, 손병현

목차

1. 서 론
2. 침강성 탄산칼슘의 물리/화학적 특성
3. 침강성 탄산칼슘의 생성에 영향을 미치는 주요 변수들
4. 결 론
참고문헌

한국어 초록

영어 초록

Precipitated calcium carbonate (PCC) is conventionally produced through the gas–solid–liquid process and can
be divided into three polymorphs: calcite, aragonite, and vaterite. Calcite is easily synthesized, because it is
the thermodynamically stable phase at room temperature and atmospheric pressure. Aragonite is a
metastable phase, while vaterite is a very unstable phase. PCC is used as filler in rubber, plastic, paint, and
paper products. In particular, aragonite PCC is used in car bumpers and dashboards as filler incorporated
with thermoplastic and polypropylene resins. This paper presents a review on producing of various structure
of PCC. A review of various process parameters (concentration of Ca(OH)2, flow rate of CO2, reaction
temperature, hydration temperature, additives, seed, Mg ion, Na2CO3, and pH) related to the formation of
PCC are presented. The more the concentration of Ca(OH)2 increases, the more the particle size of PCC
increases. The calcite is the main crystal phase at an about 30℃ reaction temperature, and the aragonite is
mainly produced at an about 80℃ reaction temperature. In addition, the initial hydration temperature of CaO
affects the particle diameter of Ca(OH)2 and the particle size and crystal phase of PCC. The higher the
concentration of PAA(additive) is, the more the particle diameter of PCC increases and the more aragonite
can be obtained. Because the Mg2+ ion acts as a cause of suppressing the growth of calcite, the yield of
aragonite increases with Mg2+ increases. pH has an effect on the structure of PCC, it is judged that a study
on the adjustment of PCC shapes using a buffer solution will be necessary in the future.

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