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Mineral carbonationMineral carbonation has garnered significant attention as an effective carbon emission reduction strategy within the context of low-carbon development. This study investigated the synergistic coupling of multi-source alkaline solid wastesSolid wastes—including steel slag (SS), steel slag tailings (SST), and desulfurization ash (DA)—typical of the metallurgical industry, for enhanced carbon sequestrationCarbon sequestration. Experimental results indicated that the carbonation degrees of SS and DA individually reached 3.84% and 10.35%, respectively. However, when mixed in a 1:1 ratio, the blended solid wasteSolid wastes achieved a carbonation degree of 20.76%. This enhancement can be attributed to the role of DA in inhibiting surface passivation and expanding the reaction interface, as well as facilitating the dissolution of highly reactive calcium-bearing minerals through substitution reactions. This study explored the synergistic coupling of solid wastesSolid wastes to strengthen carbon sequestrationCarbon sequestration, offering positive implications for the steel industry in terms of integrated waste mineralization and CO2 emission reduction.

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Experimental Study on Enhanced Carbon Sequestration Through Synergistic Coupling of Multiple Solid Wastes

  • 会议论文

  • 发表日期：

    2026年

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  • Yinbo Luo,
  • Gele Qing,
  • Shiqi Zhao,
  • Huihui Du,
  • Jinsong Li,
  • Sida Ren,
  • Dongfeng He,
  • Guilin Wang,
  • Haipeng Xia,
  • Bo Xing

摘要

Mineral carbonationMineral carbonation has garnered significant attention as an effective carbon emission reduction strategy within the context of low-carbon development. This study investigated the synergistic coupling of multi-source alkaline solid wastesSolid wastes—including steel slag (SS), steel slag tailings (SST), and desulfurization ash (DA)—typical of the metallurgical industry, for enhanced carbon sequestrationCarbon sequestration. Experimental results indicated that the carbonation degrees of SS and DA individually reached 3.84% and 10.35%, respectively. However, when mixed in a 1:1 ratio, the blended solid wasteSolid wastes achieved a carbonation degree of 20.76%. This enhancement can be attributed to the role of DA in inhibiting surface passivation and expanding the reaction interface, as well as facilitating the dissolution of highly reactive calcium-bearing minerals through substitution reactions. This study explored the synergistic coupling of solid wastesSolid wastes to strengthen carbon sequestrationCarbon sequestration, offering positive implications for the steel industry in terms of integrated waste mineralization and CO2 emission reduction.