Title

Mineralogical Sequestration of Carbon Dioxide Through Aqueous Processing of Steelmaking Slag

Abstract

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).

Department(s)

Materials Science and Engineering

Keywords and Phrases

CO2; Kinetics; Sequestration; Shrinking Core Model; Steelmaking Slag

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2007 The Minerals, Metals & Materials Society (TMS), All rights reserved.

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