Evaluation of the CO2 sequestration capacity for coal fly ash using a flow-through column reactor under ambient conditions
- Authors
- Jo, Ho Young; Ahn, Joon-Hoon; Jo, Hwanju
- Issue Date
- 30-11월-2012
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- CO2; Sequestration; Coal fly ash; Aqueous mineral carbonation; Flow-through column reactor
- Citation
- JOURNAL OF HAZARDOUS MATERIALS, v.241, pp.127 - 136
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF HAZARDOUS MATERIALS
- Volume
- 241
- Start Page
- 127
- End Page
- 136
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/106912
- DOI
- 10.1016/j.jhazmat.2012.09.020
- ISSN
- 0304-3894
- Abstract
- An in-situ CO2 sequestration method using coal ash ponds located in coastal regions is proposed. The CO2 sequestration capacity of coal fly ash (CFA) by mineral carbonation was evaluated in a flow-through column reactor under various conditions (solid dosage: 100-330 g/L, CO2 flow rate: 20-80 mL/min, solvent type: deionized (DI) water, 1 M NH4Cl solution, and seawater). The CO2 sequestration tests were conducted on CFA slurries using flow-through column reactors to simulate more realistic flow-through conditions. The CO2 sequestration capacity increased when the solid dosage was increased, whereas it was affected insignificantly by the CO2 flow rate. A 1 M NH4Cl solution was the most effective solvent, but it was not significantly different from DI water or seawater. The CO2 sequestration capacity of CFA under the flow-through conditions was approximately 0.019 gCO(2)/g CFA under the test conditions (solid dosage: 333 g/L, CO2 flow rate: 40 mL/min, and solvent: seawater). (C) 2012 Elsevier B.V. All rights reserved.
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