Sequestration of CO₂ from Steelmaking Offgas by Carbonate Formation with Slag
The alkaline earth-containing phases in steelmaking slag can form carbonates thus sequestering carbon dioxide from the surrounding atmosphere. Work has been undertaken to improve the carbonate formation kinetics, enabling steelmakers to directly remove CO2 from furnace offgas with slag, which in turn reduces the slag stabilization time. A study of basic oxygen furnace (BOF) and electric arc furnace (EAF) slags is reported in conjunction with their carbonate formation thermodynamics and capacities, yielding an overall slag CO2 capture potential. Preliminary results are presented from bench-top “wet” and “dry” slag carbonation tests on industrial slags using a slurry reactor and large-scale thermogravimetric analysis (TGA).
C. H. Rawlins et al., "Sequestration of CO₂ from Steelmaking Offgas by Carbonate Formation with Slag," AISTech Proceedings, Association for Iron & Steel Technology (AIST), Jan 2006.
Materials Science and Engineering
Peaslee Steel Manufacturing Research Center
American Iron and Steel Institute
Mittal Steel Company
United States. Department of Energy
United States Steel Corporation
Keywords and Phrases
Carbon Dioxide; Metallurgy; Phase Stability; Reaction Kinetics; Steelmaking Slag
Article - Conference proceedings
© 2006 Association for Iron & Steel Technology (AIST), All rights reserved.