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Wet versus slurry carbonation of EAF steel slag

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  • Renato Baciocchi
  • Giulia Costa
  • Elisabetta Di Bartolomeo
  • Alessandra Polettini
  • Raffaella Pomi

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

Suggested Citation

  • Renato Baciocchi & Giulia Costa & Elisabetta Di Bartolomeo & Alessandra Polettini & Raffaella Pomi, 2011. "Wet versus slurry carbonation of EAF steel slag," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 1(4), pages 312-319, December.
    • Handle: RePEc:wly:greenh:v:1:y:2011:i:4:p:312-319
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    Cited by:

    1. Sanna, Aimaro & Dri, Marco & Hall, Matthew R. & Maroto-Valer, Mercedes, 2012. "Waste materials for carbon capture and storage by mineralisation (CCSM) – A UK perspective," Applied Energy, Elsevier, vol. 99(C), pages 545-554.
    2. Giulia Costa & Alessandra Polettini & Raffaella Pomi & Alessio Stramazzo & Daniela Zingaretti, 2017. "Energetic assessment of CO 2 sequestration through slurry carbonation of steel slag: a factorial study," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 7(3), pages 530-541, June.
    3. Evangelos Georgakopoulos & Rafael M. Santos & Yi Wai Chiang & Vasilije Manovic, 2016. "Influence of process parameters on carbonation rate and conversion of steelmaking slags – Introduction of the ‘carbonation weathering rate’," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 6(4), pages 470-491, August.

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