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Morphological Change of Precipitated Calcium Carbonate by Reaction Rate in Bubble Column Reactor  

Hwang, Jung Woo (Department of Chemical Engineering, Sungkyunkwan University)
Lee, Yoong (Department of Chemical Engineering, Dankook University)
Lee, Dong Hyun (Department of Chemical Engineering, Sungkyunkwan University)
Publication Information
Korean Chemical Engineering Research / v.47, no.6, 2009 , pp. 727-733 More about this Journal
Abstract
Effects of $Ca(OH)_2$ concentration(0.16~0.64 wt%), total volumetric flow rate(3~6 L/min) and $CO_2$ volume fraction(0.3~0.6) on morphology of the precipitated $CaCO_3$ and the mean particle size of the precipitated $CaCO_3$ were investigated in the slurry bubble column reactor. Experiments were carried out in acrylic reactor($0.11m-ID{\times}1.0m-high$) with a internal tube($0.04m-ID{\times}1.0m-high$). The calibration curve on the mass ratio of $CaCO_3$ to $Ca(OH)_2$ was obtained by FT-IR for the conversion of $Ca(OH)_2$ with the reaction time. The reaction rate of $Ca(OH)_2$ increased with increasing the volumetric flow rate of $CO_2$. From SEM images, the crystal size of $CaCO_3$ increased with increasing the reaction rate in the saturated concentration of $Ca(OH)_2$ (0.16 wt%). In addition, the crystal size of precipitated $CaCO_3$ decreased with increasing the concentration of $Ca(OH)_2$, but the mean particle size of precipitated $CaCO_3$ increased with increasing the concentration of $Ca(OH)_2$.
Keywords
Precipitated Calcium Carbonate; Slurry Bubble Column; Conversion; Morphology; Reaction Rate;
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Times Cited By KSCI : 4  (Citation Analysis)
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