Mineralogical Sequestration of Carbon Dioxide Through Aqueous Processing of Steelmaking Slag
Sequestration of carbon dioxide by steelmaking slag was studied for a three-phase system of industrial slag, water, and CO2 gas. Slag-water slurries were reacted with CO2 in laboratory batch tests showing that the degree of carbonization (formation of carbonate) is time and particle size-dependent. The rate of carbonization fits well to the shrinking core model, showing that diffusion through the carbonate product layer is the rate limiting step with the reaction rate proportional to the square root of time. Testing in a two-stage wet reactor showed that degree of carbonization is proportional to slag alkaline content and particle surface area (i.e., reduction in particle size).
C. H. Rawlins et al., "Mineralogical Sequestration of Carbon Dioxide Through Aqueous Processing of Steelmaking Slag," Materials for Energy Applications: Selected Proceedings of the 2007 Materials Science and Technology Conference, The Minerals, Metals & Materials Society (TMS), Sep 2007.
Materials Science and Engineering
Keywords and Phrases
CO2; Kinetics; Sequestration; Shrinking Core Model; Steelmaking Slag
Article - Conference proceedings
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