A review on steel slag valorisation via mineral carbonation

Abstract

Research pertaining to carbon dioxide sequestration via mineral carbonation has gained significant attention, primarily due to the stability of sequestered \ce{CO2} over geological time scales. Use of industry-derived alkaline wastes...

The utilization of alkaline wastes in passive carbon capture and sequestration: Promises, challenges and environmental aspects

“…Rapid cooling produces more reactive slag composed of tricalcium silicates while slow cooling produces åkermanite or gehlenite phases that are less reactive (Engström et al, 2013;Pullin et al, 2019;Scott et al, 1986). Another issue that reduces the CO2 uptake in slag is that slag may be produced at gravel size causing it to have a low surface area thereby lowering its CO2 uptake rate (Ragipani et al, 2021).…”

Challenges and Outlines of Steelmaking toward the Year 2030 and Beyond—Indian Perspective

“…Among the industrial wastes, iron and steel slags have the maximum CO 2 sequestration potential [47]. Raghavendra et al have given an excellent review of various ways in which CO 2 can be captured such as hot route carbonation by treating the hot slag with CO 2 , direct route involving gas-solid, thin film, and aqueous slurry carbonation, and an indirect route involving pH and pressure swing CO 2 absorption techniques [48].…”

Integrated low carbon H2 conversion with in situ carbon mineralization from aqueous biomass oxygenate precursors by tuning reactive multiphase chemical interactions

“…Among alkaline industrial residues, ladle slag (LS) generated as a by-product of post-processing molten steel produced from the EAF steel making process has significant potential to store CO 2 due to its high calcium and magnesium content. 43 However, large quantities of these residues still end up in landfills with significant disposal costs and detrimental environmental impacts. The valorization potential of these materials is low due to their weak cementitious properties, low strength, and potential leaching of heavy metals which can inhibit utilization for several key applications.…”