Fixation of CO2 by carbonating calcium derived from blast furnace slag |
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| Authors: | Sanni Eloneva Sebastian Teir Justin Salminen Carl-Johan Fogelholm Ron Zevenhoven |
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| Affiliation: | 1. Laboratory of Energy Engineering and Environmental Protection, Helsinki University of Technology, P.O. Box 4400, FIN-02015 TKK, Finland;2. Heat Engineering Laboratory, Åbo Akademi University, Piispankatu 8, FIN-20500 Turku, Finland |
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| Abstract: | Industrial waste materials, such as steelmaking slags, appear to be potential raw materials for reducing CO2 emissions by carbonation. The suitability of applying a carbonation route based on acetic acid leaching to produce carbonates from blast furnace slag is presented in this study. The effect of solution pH, temperature, and CO2 pressure on the precipitation of carbonates was experimentally studied. A simple thermodynamic model was used to verify our results. The feasibility of the process was also discussed, addressing energy input requirements and the consumption of chemicals. |
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| Keywords: | Mineral carbonation Calcium carbonate Carbon dioxide Acetic acid Steelmaking slag |
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