Evaluation of the CO2 sequestration capacity for coal fly ash using a flow-through column reactor under ambient conditions.
An in-situ CO(2) sequestration method using coal ash ponds located in coastal regions is proposed. The CO(2) 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, CO(2) flow rate: 20-80 mL/min, solvent type: deionized (DI) water, 1 M NH(4)Cl solution, and seawater). The CO(2) sequestration tests were conducted on CFA slurries using flow-through column reactors to simulate more realistic flow-through conditions. The CO(2) sequestration capacity increased when the solid dosage was increased, whereas it was affected insignificantly by the CO(2) flow rate. A 1 M NH(4)Cl solution was the most effective solvent, but it was not significantly different from DI water or seawater. The CO(2) sequestration capacity of CFA under the flow-through conditions was approximately 0.019 g CO(2)/g CFA under the test conditions (solid dosage: 333 g/L, CO(2) flow rate: 40 mL/min, and solvent: seawater).
Department of Earth and Environmental Sciences, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-713, Republic of Korea. hyjo@korea.ac.kr
Ho Young
HY
Jo
Joon-Hoon
JH
Ahn
Hwanju
H
Jo
D000393:Air Pollutants / Q000032:analysis / Q000302:isolation & purification*; D000397:Air Pollution / Q000032:analysis / Q000517:prevention & control*; D002245:Carbon Dioxide / Q000032:analysis / Q000302:isolation & purification*; D060729:Coal Ash / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000295:instrumentation / Q000379:methods; D004867:Equipment Design; D008855:Microscopy, Electron, Scanning; D008962:Models, Theoretical; D013499:Surface Properties; D013818:Thermogravimetry; D014866:Waste Products; D014961:X-Ray Diffraction
D000393:Air Pollutants; D060729:Coal Ash; D014866:Waste Products; D002245:Carbon Dioxide