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Modified phosphogypsum sequestrating CO2 and characteristics of the carbonation product

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

Abstract

A method of PG carbonation to produce polymorphs of high-purity CaCO3 was proposed. The effect of experimental conditions on transformation process from PG to calcium carbonate was systematically discussed. PG transformed into granular portlandite and fibrous quartz under the action of caustic soda at room temperature for 10 min. The carbonation ratio (η) was 98.57%, and 1000 kg of PG could produce 519 kg of high-purity CaCO3 and sequestrated 228 kg of CO2. The spherical vaterite carbonation product met the relevant standards for the industrial precipitated calcium carbonate. A reaction mechanism of PG carbonation was also proposed by thermodynamic research of the gas-liquid-solid reaction. The products with a single vaterite structure, or a vaterite and calcite mixing structure or a vaterite, aragonite and calcite mixing structure were all successfully prepared. All of these indicated that the whole procedure setup of PG carbonation showed potential application for PG utilization and CO2 sequestration.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:energy:v:182:y:2019:i:c:p:224-235
    DOI: 10.1016/j.energy.2019.05.220
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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. 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).
    3. Chen, Qiuju & Ding, Wenjin & Sun, Hongjuan & Peng, Tongjiang & Ma, Guohua, 2020. "Indirect mineral carbonation of phosphogypsum for CO2 sequestration," Energy, Elsevier, vol. 206(C).
    4. Nam, Hyungseok & Won, Yooseob & Kim, Jae-Young & Yi, Chang-Keun & Park, Young Cheol & Woo, Jae Min & Jung, Su-Yeong & Jin, Gyoung-Tae & Jo, Sung-Ho & Lee, Seung-Yong & Kim, Hyunuk & Park, Jaehyeon, 2020. "Hydrodynamics and heat transfer coefficients during CO2 carbonation reaction in a circulated fluidized bed reactor using 200 kg potassium-based dry sorbent," Energy, Elsevier, vol. 193(C).
    5. 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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