Poetra et al. (2026): Aqueous matrix and limiting factors in steel slag carbonation under elevated CO₂ at ambient conditions
Reinaldy Poetra, Jens Hartmann, Mathilde Hagens, Ina Sophia Nipper, Lukas Rieder and Charly A. Moras, IN: npj Materials Sustainability, https://doi.org/10.1038/s44296-026-00116-9
Alkaline industrial by-products have significant potential for permanent CO₂ sequestration, but their reaction kinetics and controlling factors are often overlooked. This study examined the direct aqueous carbonation of basic oxygen furnace (BOF) slag in a slurry setup with continuous mechanical mixing and CO₂-enriched air bubbling in ultrapure water and natural seawater, at 25% pCO₂ under ambient temperature and 1 atm for 24 h.