Mineralogical Sequestration of Carbon Dioxide through Aqueous Processing of Steelmaking Slag

Author

C. Hank Rawlins
Semen Naumovich Lekakh, Missouri University of Science and TechnologyFollow
Von Richards, Missouri University of Science and TechnologyFollow
Kent D. Peaslee, Missouri University of Science and TechnologyFollow

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).

Recommended Citation

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.

Department(s)

Materials Science and Engineering

Research Center/Lab(s)

Peaslee Steel Manufacturing Research Center

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.

Publication Date

01 Sep 2007