Articles producció científica> Química Física i Inorgànica

A thorough assessment of mineral carbonation of steel slag and refractory waste

  • Identification data

    Identifier: imarina:9382348
    Handle: https://hdl.handle.net/20.500.11797/imarina9382348
    Authors:
    Capelo-Avilés STomazini de Oliveira RGallo Stampino IIGispert-Guirado FCasals-Terré AGiancola SGalán-Mascarós JR
    Abstract:
    Escalating industrial CO2 emissions necessitate innovative carbon capture and utilization strategies. This study explores the potential of mineral-carbonation of steelmaking slags, particularly White Slag (WS) and various Refractory Wastes (RWs), to mitigate CO2 emissions and valorize industrial wastes. Experiments were performed with waste materials from the production lines at CELSA (Barcelona, Spain). We delved into direct aqueous carbonation, evaluating the performance and characteristics of these wastes under different experimental conditions. Our findings reveal that all slags can effectively sequester CO2. This process is effective not only for pure CO2 but also for diluted flue gases under mild conditions (≤ 100 ºC, ≤ 6 bar). Specifically, WS exhibited peak CO2 sequestration capacities (SC) of 359.79 gCO2/kgslag (pure CO2) and 276.65 gCO2/kgslag (diluted flue gas). In contrast, the RWs presented different kinetic, reaching a maximum SC of 311 gCO2/kgslag after prolonged times. Given the large inhomogeneity of RWs, individual analysis of distinct RW fractions revealed significant variations in carbonation performance. Tundish RW exhibited the highest CO2 sequestration capacity, emphasizing the importance of waste source and mineral composition in the carbonation. Chemical and morphological evaluations confirmed the transformation of CaO to CaCO3, with MgO remaining largely inert. Additionally, the process indicated potential environmental benefits by reducing the mobility of toxic metals, particularly Pb, suggesting an ancillary avenue for waste treatment. This study underscores the utility of CO2 mineralization as a dual-benefit approach within the circular economy framework, offering insights into its application for sustainable waste management and CO2 emissio

  • Others:

    Author, as appears in the article.: Capelo-Avilés S; Tomazini de Oliveira R; Gallo Stampino II; Gispert-Guirado F; Casals-Terré A; Giancola S; Galán-Mascarós JR
    Department: Química Física i Inorgànica
    URV's Author/s: Capelo Avilés, Santiago Alexander / Gispert Guirado, Francesc / GUIRADO PAGÉS, FRANCISCO
    Keywords: Steel slags carbonation Industrial wastes valorisation Co mineralization 2 Co capture and utilization 2 Circular economy
    Abstract: Escalating industrial CO2 emissions necessitate innovative carbon capture and utilization strategies. This study explores the potential of mineral-carbonation of steelmaking slags, particularly White Slag (WS) and various Refractory Wastes (RWs), to mitigate CO2 emissions and valorize industrial wastes. Experiments were performed with waste materials from the production lines at CELSA (Barcelona, Spain). We delved into direct aqueous carbonation, evaluating the performance and characteristics of these wastes under different experimental conditions. Our findings reveal that all slags can effectively sequester CO2. This process is effective not only for pure CO2 but also for diluted flue gases under mild conditions (≤ 100 ºC, ≤ 6 bar). Specifically, WS exhibited peak CO2 sequestration capacities (SC) of 359.79 gCO2/kgslag (pure CO2) and 276.65 gCO2/kgslag (diluted flue gas). In contrast, the RWs presented different kinetic, reaching a maximum SC of 311 gCO2/kgslag after prolonged times. Given the large inhomogeneity of RWs, individual analysis of distinct RW fractions revealed significant variations in carbonation performance. Tundish RW exhibited the highest CO2 sequestration capacity, emphasizing the importance of waste source and mineral composition in the carbonation. Chemical and morphological evaluations confirmed the transformation of CaO to CaCO3, with MgO remaining largely inert. Additionally, the process indicated potential environmental benefits by reducing the mobility of toxic metals, particularly Pb, suggesting an ancillary avenue for waste treatment. This study underscores the utility of CO2 mineralization as a dual-benefit approach within the circular economy framework, offering insights into its application for sustainable waste management and CO2 emission reduction in the steel industry.
    Thematic Areas: Waste management and disposal Química Process chemistry and technology Engineering, chemical Engenharias ii Ciências ambientais Ciência de alimentos Chemistry, multidisciplinary Chemical engineering (miscellaneous) Biodiversidade
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: santiagoalexander.capelo@estudiants.urv.cat
    Record's date: 2024-10-05
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://www.sciencedirect.com/science/article/pii/S2212982024001057
    Papper original source: Journal Of Co2 Utilization. 82
    APA: Capelo-Avilés S; Tomazini de Oliveira R; Gallo Stampino II; Gispert-Guirado F; Casals-Terré A; Giancola S; Galán-Mascarós JR (2024). A thorough assessment of mineral carbonation of steel slag and refractory waste. Journal Of Co2 Utilization, 82(), -. DOI: 10.1016/j.jcou.2024.102770
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Article's DOI: 10.1016/j.jcou.2024.102770
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2024
    Publication Type: Journal Publications

  • Keywords:

    Chemical Engineering (Miscellaneous),Chemistry, Multidisciplinary,Engineering, Chemical,Process Chemistry and Technology,Waste Management and Disposal
    Steel slags carbonation
    Industrial wastes valorisation
    Co mineralization 2
    Co capture and utilization 2
    Circular economy
    Waste management and disposal
    Química
    Process chemistry and technology
    Engineering, chemical
    Engenharias ii
    Ciências ambientais
    Ciência de alimentos
    Chemistry, multidisciplinary
    Chemical engineering (miscellaneous)
    Biodiversidade

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