Frontiers in Chemistry (Oct 2020)

Co-treatment of Waste From Steelmaking Processes: Steel Slag-Based Carbon Capture and Storage by Mineralization

  • Qing Zhao,
  • Qing Zhao,
  • Xinyi Chu,
  • Xiaohui Mei,
  • Xiaohui Mei,
  • Qingzhang Meng,
  • Jingyu Li,
  • Chengjun Liu,
  • Chengjun Liu,
  • Henrik Saxén,
  • Ron Zevenhoven

DOI
https://doi.org/10.3389/fchem.2020.571504
Journal volume & issue
Vol. 8

Abstract

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The iron and steel industry is an energy-intensive sector, and large amounts of waste/ by-products are generated during the steelmaking process, such as CO2, metallurgical slag, and wastewater. Enhancing the development and deployment of treating waste from the steelmaking process will be environment friendly and resource-saving. Capturing CO2 by steel slag (SS) via mineralization is regarded to be an excellent choice due to the high basicity of the slag. In this paper, recent research on the steel slag-based carbon capture and storage (SS-CCS) by mineralization was summarized. Three routes of SS-CCS are compared including, direct gas-solid carbonation, direct aqueous carbonation, and indirect carbonation, respectively. Furthermore, the challenges and prospects for further development of the SS-CCS were discussed.

Keywords