Wet versus slurry carbonation of EAF steel slag

Renato Baciocchi, Giulia Costa, Elisabetta Di Bartolomeo, Alessandra Polettini and Raffaella Pomi

Greenhouse Gases: Science and Technology, 2011, vol. 1, issue 4, 312-319

Abstract: The CO 2 uptake and Ca‐to‐carbonate conversion yield attained by wet and slurry‐phase carbonation of stainless steel slag are reported. A maximum CO 2 uptake of 180 g CO 2 /kg slag was achieved under wet conditions (50 °C, 3 bar CO 2 , 0.4 l/kg), corresponding to a Ca‐to‐carbonate conversion yield of 50%. The slurry‐phase process, even when adopting more energy‐intensive operating conditions, did not improve the CO 2 uptake kinetics and conversion yield in comparison to the wet treatment. The mineralogy of the carbonated slag exhibited a decreased content of silicate phases (Ca 2 SiO 4 in particular), a marked reduction of Ca and Mg oxides, and a noteworthy increase of calcite. © 2011 Society of Chemical Industry and John Wiley & Sons, Ltd

Date: 2011
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Persistent link: https://EconPapers.repec.org/RePEc:wly:greenh:v:1:y:2011:i:4:p:312-319

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