Journal of CO2 Utilization, Год журнала: 2024, Номер 82, С. 102770 - 102770

Опубликована: Апрель 1, 2024

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

Язык: Английский