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Impacts of Organic Structures and Inherent Minerals of Coal on Soot Formation during Pyrolysis

Author

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  • He-Ming Dong

    (Institute of Combustion Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China)

  • Qian Du

    (Institute of Combustion Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China)

  • Dun Li

    (Institute of Combustion Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China)

  • Zhao-Yang Cui

    (Institute of Combustion Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China)

  • Jian-Min Gao

    (Institute of Combustion Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China)

  • Shao-Hua Wu

    (Institute of Combustion Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China)

Abstract

The pyrolysis of four pairs of raw and acid-washed coals under N 2 atmosphere was carried out in a drop tube reactor at 1250 °C. The results show that both organic structures and metal elements have an important influence on the formation of soot. The total area of aromatic and aliphatic hydrogen absorption bands is positively correlated with soot yield. Aromatic compounds have a greater contribution to soot and tar formation. The absorption band area of oxygen structures in coal FTIR spectra is negatively correlated with the soot conversion rate of tar. During pyrolysis, metal substances in coal can catalyze the dehydrogenation and deoxygenation of tar, reduce the content and stability of the aliphatic compound, and catalyze aromatic ring rupturing. More importantly, gasified metals can inhibit the polymerization reaction of aromatic compounds.

Suggested Citation

  • He-Ming Dong & Qian Du & Dun Li & Zhao-Yang Cui & Jian-Min Gao & Shao-Hua Wu, 2019. "Impacts of Organic Structures and Inherent Minerals of Coal on Soot Formation during Pyrolysis," Energies, MDPI, vol. 12(23), pages 1-16, November.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:23:p:4410-:d:289135
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    References listed on IDEAS

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    1. Ludwik Kosyrczyk & Slawomir Stelmach & Krzysztof Gaska & Agnieszka Generowicz & Natalia Iwaszczuk & Dariusz Kardaś, 2021. "Optimization of Thermal Parameters of the Coke Oven Battery by Modified Methodology of Temperature Measurement in Heating Flues as the Management Tool in the Cokemaking Industry," Energies, MDPI, vol. 14(4), pages 1-13, February.
    2. Li, Dun & Gao, Jianmin & Zhao, Ziqi & Du, Qian & Dong, Heming & Cui, Zhaoyang, 2022. "Effects of iron on coal pyrolysis-derived soot formation," Energy, Elsevier, vol. 249(C).

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    Keywords

    soot; coal pyrolysis; tar; FTIR;
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