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Gasification of the Char Residues with High Ash Content by Carbon Dioxide

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  • Junjie Xue

    (PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China)

  • Zhen Dong

    (PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China)

  • Hao Chen

    (PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China
    Key Laboratory of CBM Resource and Reservoir Formation Process, China University of Mining and Technology, Xuzhou 221008, China)

  • Mengyuan Zhang

    (PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China)

  • Yufeng Zhao

    (PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China)

  • Yanpeng Chen

    (PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China)

  • Shanshan Chen

    (PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China)

Abstract

To increase the carbon conversion of char in gasification, this paper aimed to reveal the gasification behaviours of char residues. Char residues with different ash contents in this work were prepared from Shenmu char and Tejing char. Those char residues were gasified by different CO 2 gas mixtures at different temperatures. The gasification process of char residue was different from the end stage of the gasification process of the corresponding raw char: the gasification rate of the char residue increased at first and then decreased, whereas the gasification rate of the corresponding raw char kept decreasing during the end stage of gasification. The highest gasification rate was achieved at a lower conversion in the gasification of char residue than in the gasification of the corresponding raw char. Catalytic minerals, high temperature, and high CO 2 partial pressure benefited the gasification of gasified char residues. The char residues that contained more catalytic minerals were more reactive in gasification and were less sensitive to changes in temperature and CO 2 partial pressure. The Modified Random Pore Model (MRPM) and Random Pore Model (RPM) were used to predict the gasification kinetics of the chars, and the MRPM describes the gasification processes of gasified char residues well.

Suggested Citation

  • Junjie Xue & Zhen Dong & Hao Chen & Mengyuan Zhang & Yufeng Zhao & Yanpeng Chen & Shanshan Chen, 2024. "Gasification of the Char Residues with High Ash Content by Carbon Dioxide," Energies, MDPI, vol. 17(17), pages 1-35, September.
  • Handle: RePEc:gam:jeners:v:17:y:2024:i:17:p:4432-:d:1471058
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    References listed on IDEAS

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