CO2 Sequestration Through Aqueous Carbonation of Electric Arc Furnace Slag

IF 1.6 4区 工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY Journal of Advanced Concrete Technology Pub Date : 2024-04-12 DOI:10.3151/jact.22.207
Francesca Bonfante, Giuseppe Ferrara, Pedro Humbert, Davide Garufi, Jean-Marc Christian Tulliani, Paola Palmero
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Abstract

Electric Arc Furnace slag (EAF slag) reuse is currently limited by its inconsistent chemical composition and volume instability. However, the alkaline composition suggests the possibility to use this material for carbon capture and storage. This study investigated the CO2 uptake of EAF slag using a direct aqueous carbonation technique. The process was implemented at room temperature and ambient pressure, with minimized energy consumption. The CO2-reactive phases were identified through X-ray diffraction analysis. Different CO2 quantification techniques were employed: thermogravimetric analysis, acid digestion and thermal decomposition. The replicability of experiments and quantification techniques was assessed through analysis of variance and pairwise comparisons. The average CO2 uptake and coefficient of variation resulted respectively 7.9% and 9.0%, with a carbonation degree of about 34%, proving that this simple mineralization process can be promising even in mild conditions.

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通过电弧炉炉渣水碳化封存二氧化碳
电弧炉炉渣(EAF slag)的再利用目前受到其化学成分不一致和体积不稳定的限制。不过,其碱性成分表明有可能将这种材料用于碳捕集与封存。本研究采用直接水溶液碳化技术对电弧炉炉渣的二氧化碳吸收进行了研究。该工艺在室温和环境压力下进行,能耗最小。通过 X 射线衍射分析确定了二氧化碳反应相。采用了不同的二氧化碳定量技术:热重分析、酸消化和热分解。通过方差分析和配对比较评估了实验和定量技术的可重复性。结果显示,二氧化碳的平均吸收率和变异系数分别为 7.9% 和 9.0%,碳化程度约为 34%,这证明即使在温和的条件下,这种简单的矿化过程也是有前景的。
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来源期刊
Journal of Advanced Concrete Technology
Journal of Advanced Concrete Technology 工程技术-材料科学:综合
CiteScore
3.70
自引率
10.00%
发文量
45
审稿时长
3.5 months
期刊介绍: JACT is fast. Only 5 to 7 months from submission to publishing thanks to electronic file exchange between you, the reviewers and the editors. JACT is high quality. Peer-reviewed by internationally renowned experts who return review comments to ensure the highest possible quality. JACT is transparent. The status of your manuscript from submission to publishing can be viewed on our website, greatly reducing the frustration of being kept in the dark, possibly for over a year in the case of some journals. JACT is cost-effective. Submission and subscription are free of charge . Full-text PDF files are available for the authors to open at their web sites. Scope: *Materials: -Material properties -Fresh concrete -Hardened concrete -High performance concrete -Development of new materials -Fiber reinforcement *Maintenance and Rehabilitation: -Durability and repair -Strengthening/Rehabilitation -LCC for concrete structures -Environmant conscious materials *Structures: -Design and construction of RC and PC Structures -Seismic design -Safety against environmental disasters -Failure mechanism and non-linear analysis/modeling -Composite and mixed structures *Other: -Monitoring -Aesthetics of concrete structures -Other concrete related topics
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