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Indirect mineral carbonation of phosphogypsum for CO2 sequestration

Author

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  • Chen, Qiuju
  • Ding, Wenjin
  • Sun, Hongjuan
  • Peng, Tongjiang
  • Ma, Guohua

Abstract

An indirect mineral carbonation of phosphogypsum with NaCl and NH4OH was proposed. The effect of different process conditions on the extracting process of CaSO4·2H2O in phosphogypsum, the carbonation ratio of Ca2+ in the CaSO4·2H2O lixivium, and the crystal phase and morphology of the product during the carbonation process were systematically discussed. NaCl was tried to be reused. Impacts of NaCl recycling number on the carbonation reaction efficiency and the crystal phase of the carbonated products were also studied. The leaching rate of Ca2+ in phosphogypsum was 49.42% under the optimized conditions. The carbonation ratio was 96.31%. The carbonated product composed of pure calcite, or vaterite and calcite was successfully prepared by adjusting the reaction conditions and NaCl cycle number. The performance of the obtained product met the Chinese standard requirements of HG/T 2226–2010. The proposed PG carbonation strategy showed potential prospect of application.

Suggested Citation

  • Chen, Qiuju & Ding, Wenjin & Sun, Hongjuan & Peng, Tongjiang & Ma, Guohua, 2020. "Indirect mineral carbonation of phosphogypsum for CO2 sequestration," Energy, Elsevier, vol. 206(C).
    • Handle: RePEc:eee:energy:v:206:y:2020:i:c:s036054422031255x
    DOI: 10.1016/j.energy.2020.118148
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    References listed on IDEAS

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    1. Ding, Wenjin & Chen, Qiuju & Sun, Hongjuan & Peng, Tongjiang, 2019. "Modified phosphogypsum sequestrating CO2 and characteristics of the carbonation product," Energy, Elsevier, vol. 182(C), pages 224-235.
    2. Chen, Qiuju & Ding, Wenjin & Sun, Hongjuan & Peng, Tongjiang, 2019. "Mineral carbonation of yellow phosphorus slag and characterization of carbonated product," Energy, Elsevier, vol. 188(C).
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    Citations

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    Cited by:

    1. Baizhi Wu & Haibin Wang & Chunlei Li & Yuan Gong & Yi Wang, 2023. "Progress in the Preparation of Calcium Carbonate by Indirect Mineralization of Industrial By-Product Gypsum," Sustainability, MDPI, vol. 15(12), pages 1-16, June.
    2. Li, Fenghai & Zhao, Wei & Li, Junguo & Fan, Hongli & Xu, Meiling & Han, Guopeng & Guo, Mingxi & Wang, Zhiqing & Huang, Jiejie & Fang, Yitian, 2023. "Investigation on influencing mechanisms of phosphogypsum (PG) on the ash fusion behaviors of coal," Energy, Elsevier, vol. 268(C).

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