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Search / Korean Journal of Chemical Engineering
HWAHAK KONGHAK,
Vol.36, No.1, 49-55, 1998
MSMPR 반응기에서 기-액 반응성 탄산칼슘 결정화에 미치는 교반속도 영향
Effect of Agitation on Gas-Liquid Reaction Crystallization of Calcium Carbonate in an MSMPR Reactor
이상구, 정왕모, 김우식, 최창균
Rushton형 MSMPR 반응기내에서 이산화탄소와 수산화칼슘의 기-액 반응에 의해 생성되는 탄산칼슘 결정화에 교반이 미치는 영향에 관해 실험적으로 연구하였다. 생성된 탄산칼슘 결정의 부피분율분포는 이중분포 형태를 나타내었으며 결정입도분포는 반로그 그래프 상에서 두 개의 직선으로 나타났다. 이와 같은 현상은 탄산칼슘결정이 크기에 의존하는 성장과정을 거치기 때문이며 이것은 반응기내의 용액교반과 밀접한 관계가 있다. 교반속도가 증가함에 따라 결정성장속도는 증가하였으나 핵생성속도는 감소하는 결과를 나타내었다. X-선 회절 및 전자현미경 관찰에 의해, 본 연구에서 생성된 탄산칼슘 결정의 결정계 및 모양은 정방형 calcite로 나타났다.
Experimental investigation of the agitation effect on crystallization of calcium carbonate, which was produced by gas-liquid reaction of CO2 and Ca(OH)2 in a Rushton-type MSMPR reactor, was carried out. The volume fraction distribution of calcium carbonate produced was bimodal and the crystal population distribution showed two straight lines on a semi-log plot. These phenomena on distributions of crystal volume fraction and crystal population were supposed to be due to size-dependent growth process of calcium carbonate crystals. With increasing the agitation speed, the crystal growth rate of calcium carbonate increased, but the crystal birth rate of calcium carbonate decreased. From XRD and microscopic studies, the present calcium carbonate crystals were revealed as cubic calcite.
Keywords: Calcium Carbonate; Crystal Population Distribution; Cubic Calcite; MSMPR Reactor; Size-Dependent Growth
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[Cited By]
  1. Lee SG, Jung WM, Kim WS, Choi CK, HWAHAK KONGHAK, 38(1), 67, 2000
  2. Kim HJ, Kim WS, Kim WS, Journal of the Korean Industrial and Engineering Chemistry, 9(7), 1004, 1998
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