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Effect of alkali (K/Na) metal vapor on the metallurgical properties of coke in CO2–O2–N2 mixed atmosphere

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  • Wang, Meichen
  • Wei, Guangsheng
  • Yang, Shufeng
  • Zhu, Rong
  • Yang, Lingzhi

Abstract

The mixed injection of CO2 and O2 in blast furnace is a novel method. The effect of alkali metal vapor on coke structure was studied by gas phase adsorption method. XRD, Raman and other characterization methods showed that K/Na metal vapor reacted with carbon matrix to form new minerals, which destroyed the original dense aromatic ring structure of metallurgical coke and reduced the high-temperature properties of metallurgical coke. In this work, the influence mechanism of alkali metals on coke in blast furnace in CO2–O2–N2 mixed atmosphere was studied by thermogravimetric analysis. The dynamic analysis results show that when the heating rate is 5 K min−1, the deviation value of VM is only 0.64%, and the corresponding urcm is 1.4%. Other experimental results show similar results, indicating that the product model (VM) has the best simulation effect on the reaction process of metallurgical coke.

Suggested Citation

  • Wang, Meichen & Wei, Guangsheng & Yang, Shufeng & Zhu, Rong & Yang, Lingzhi, 2022. "Effect of alkali (K/Na) metal vapor on the metallurgical properties of coke in CO2–O2–N2 mixed atmosphere," Energy, Elsevier, vol. 257(C).
    • Handle: RePEc:eee:energy:v:257:y:2022:i:c:s0360544222016516
    DOI: 10.1016/j.energy.2022.124748
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    References listed on IDEAS

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    1. Wang, Guangwei & Zhang, Jianliang & Shao, Jiugang & Liu, Zhengjian & Wang, Haiyang & Li, Xinyu & Zhang, Pengcheng & Geng, Weiwei & Zhang, Guohua, 2016. "Experimental and modeling studies on CO2 gasification of biomass chars," Energy, Elsevier, vol. 114(C), pages 143-154.
    2. Guizani, Chamseddine & Jeguirim, Mejdi & Gadiou, Roger & Escudero Sanz, Fransisco Javier & Salvador, Sylvain, 2016. "Biomass char gasification by H2O, CO2 and their mixture: Evolution of chemical, textural and structural properties of the chars," Energy, Elsevier, vol. 112(C), pages 133-145.
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