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| 標題: | Calcium carbonate granulation in a fluidized-bed reactor: Kinetic, parametric and granule characterization analyses |
| 作者: | Sioson, Arianne S.
Choi, Angelo Earvin Sy
de Luna, Mark Daniel G.
Huang, Yao-Hui
Lu, Ming-Chun |
| 貢獻者: | Univ Philippines Diliman, Natl Grad Sch Engn, Environm Engn Program
Natl Res Ctr Disaster Free & Safe Ocean City
Univ Philippines Diliman, Dept Chem Engn
Natl Cheng Kung Univ, Dept Chem Engn
Chia Nan Univ Pharm & Sci, Dept Environm Resources Management |
| 關鍵字: | Calcium carbonate
Carbon dioxide capture
Fluidized-bed reactor
Global warming
Homogeneous granulation
Kinetic analysis |
| 日期: | 2020 |
| 上傳時間: | 2022-11-18 11:23:36 (UTC+8) |
| 出版者: | Elsevier Science Sa |
| 摘要: | The granulation of calcium carbonate (CaCO3) exhibited high industrial demand due to its wider application and importance in cement, paper, glass and steel manufacturing. This paper investigated the granulation kinetics of CaCO3 through the fluidized-bed homogeneous granulation (FBHG) process during the homogenous nucleation stage. The CaOH solution was used as source of Ca2+ reactant, while K2CO3 solution as source of CO32- precipitant. The mechanism followed the pseudo-second order kinetics. The calcium cation attracts the carbonate anion to form CaCO3 through a double displacement chemical reaction. The calcium-is-to-carbonate molar ratio ([Ca2+]/[CO32-]) was varied into 1.25 to 2.50, with constant values of pH = 10 +/- 0.2, influent carbonate concentration = 10 mM and total influx flow rate = 60 mL min(-1). The ideal [Ca2+]/[CO32-] condition was found to be at 1.50 that means the precipitation of CaCO3 grew and stayed inside the reactor. At the same condition, granules of diameter size of 1 mm to 2 mm were collected with a subrounded shape and smooth surface as shown by its surface morphology. The characterization analysis also verified the high purity of CaCO3 aragonite granules precipitated through the FBHG process. |
| 關聯: | Chemical Engineering Journal, v.382, pp.9 |
| 顯示於類別: | [環境資源管理系(所)] 期刊論文
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