DOI: 10.1016/j.jcou.2016.09.003
Scopus记录号: 2-s2.0-84988494032
论文题名: CO2 sequestration technology through mineral carbonation: An extraction and carbonation of blast slag
作者: Lee S. ; Kim J.-W. ; Chae S. ; Bang J.-H. ; Lee S.-W.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2016
卷: 16 起始页码: 336
结束页码: 345
语种: 英语
英文关键词: Blast slag
; Calcium carbonate
; Calcium extraction
; Carbonation
; CO2
Scopus关键词: Blast furnaces
; Calcium
; Calcium carbonate
; Carbon dioxide
; Carbonation
; Characterization
; Chemical analysis
; Inductively coupled plasma
; Minerals
; Optical emission spectroscopy
; Salts
; Scanning electron microscopy
; Slags
; Solvents
; Spectrometers
; Spectrometry
; Calcium and magnesiums
; Calcium concentration
; Energy dispersive spectrometers
; Extraction efficiencies
; Field emission scanning electron microscopes
; Inductively coupled plasma-optical emission spectrometry
; Sequestration technology
; Thermodynamically stable
; Extraction
英文摘要: Mineral carbonation refers to a CO2 sequestration technology which is used to produce carbonate from minerals containing calcium and magnesium which are then reacted with CO2. It has been assessed as technology that disposes of CO2 in a thermodynamically stable state. In this study, calcium ion was extracted from blast furnace slag, granulated slag and air-cooled slag and calcium carbonate was then synthesized from the extracted calcium, which was reacted with CO2. Based on the results, the feasibility of reducing CO2 emissions in this manner is demonstrated. The chemical composition of blast furnace slag as a raw material was analyzed by inductively coupled plasma optical emission spectrometry (ICP-OES), and the characterization of the crystal phase of the slag were calculated by the Rietveld method. Calcium extraction was conducted using ammonium salts (NH4NO3, NH4Cl, CH3COONH4 with (NH4)2SO4) as an extraction solvent under ambient conditions (30 °C, 1 bar). The calcium extraction efficiency was compared according to the solvent type and the optimal extraction conditions were examined according to the experimental variables of the solvent concentration, reaction temperature, reaction time and solid-to-liquid ratio. The calcium concentration in the extraction solution was measured by ICP-OES. The calcium extraction efficiency was proportional to the solvent concentration, the reaction temperature and the reaction time, whereas it was not proportional to the solid-to-liquid ratio. The calcium extraction efficiency of NH4NO3, NH4Cl and CH3COONH4 was approximately 52.0 wt.% on average and the Ca extraction efficiency of (NH4)2SO4 showed a low value (37.7 wt.%) compared to those of other solvents. A field-emission scanning electron microscope (FE-SEM) equipped with an energy dispersive spectrometer (EDS) was employed to assess the surface morphology and for an elemental analysis of the calcium carbonate synthesized from the carbonation test. The economic assessment to reduce CO2 was conducted based on this information along with the calcium extraction efficiency, and processing costs of the solvents, CO2, and other materials. © 2016 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52886
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Lee S.,Kim J.-W.,Chae S.,et al. CO2 sequestration technology through mineral carbonation: An extraction and carbonation of blast slag[J]. Journal of CO2 Utilization,2016-01-01,16