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<p>The oxy-steam combustion characteristics of ShenFu (SF) superfine pulverized coal with three average particle sizes (9.83, 21.63, and 35.26&#xa0;μm) were studied by thermogravimetric analysis. Combustion tests were performed under different atmospheres (O₂/N₂, O₂/CO₂, and O₂/H₂O) with oxygen concentrations of 21, 30, 40, and 60%. Under the same oxygen concentration, the ignition and burnout temperatures in the O₂/H₂O atmosphere are lower than those in the O₂/N₂ and O₂/CO₂ atmospheres, which indicates that steam significantly enhances combustion reactivity. For samples of the same particle size, increasing the oxygen concentration shifts the combustion process to a lower temperature region, further enhancing reactivity. The influence of particle size varies across the different atmospheres. In the O₂/H₂O atmosphere at a fixed oxygen concentration, reactivity decreases rapidly as the average particle size increases from 21.63 to 35.26&#xa0;μm, while only a slight decrease is observed when the size increases from 9.83 to 21.63&#xa0;μm.</p>

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Oxy-steam combustion characteristics of superfine pulverized coal by thermogravimetric analysis

  • 期刊论文

  • 发表日期：

    2025年11月21日

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  • Liang Zhang,
  • Shiying Cao

摘要

The oxy-steam combustion characteristics of ShenFu (SF) superfine pulverized coal with three average particle sizes (9.83, 21.63, and 35.26 μm) were studied by thermogravimetric analysis. Combustion tests were performed under different atmospheres (O₂/N₂, O₂/CO₂, and O₂/H₂O) with oxygen concentrations of 21, 30, 40, and 60%. Under the same oxygen concentration, the ignition and burnout temperatures in the O₂/H₂O atmosphere are lower than those in the O₂/N₂ and O₂/CO₂ atmospheres, which indicates that steam significantly enhances combustion reactivity. For samples of the same particle size, increasing the oxygen concentration shifts the combustion process to a lower temperature region, further enhancing reactivity. The influence of particle size varies across the different atmospheres. In the O₂/H₂O atmosphere at a fixed oxygen concentration, reactivity decreases rapidly as the average particle size increases from 21.63 to 35.26 μm, while only a slight decrease is observed when the size increases from 9.83 to 21.63 μm.