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<p>In order to thoroughly investigate the chemical reaction kinetic mechanism and comprehensively evaluate the combustibility indices and NO<sub><i>x</i></sub> emissions behaviors of preheated coal char in complex combustion reactions, both combustion thermal-kinetics and NO<sub><i>x</i></sub> emissions characteristics were experimentally investigated using the thermogravimetry-mass spectrometry (TG-MS) method. The combustion characteristics of raw coal and its char derived from preheating physicochemistry modification were comparatively investigated using the TG/DTG method. The emission characteristics of NH<sub>3</sub>, NO, and NO<sub>2</sub> were quantitatively assessed through mass spectrometry measurement. The combustion chemical reaction rates were meticulously evaluated using both single scan rate and multiple scan rate approaches. Results indicated that with the increase of heating rate, the combustibility index and burnout index increased approximately. After preheating, the majority of volatiles and volatile nitrogen are released. Furthermore, during the combustion process, the respective emissions of NO, NO<sub>2</sub>, and NH<sub>3</sub> reduced by approximately 25%, 30%, and 80%.</p>

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Experimental Investigation and Kinetic Analysis of Preheated Coal Char Combustion: Comprehensive Combustibility and NOx Emission Reduction

  • 期刊论文

  • 发表日期：

    2026年4月16日

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  • Yu Huang,
  • Jingzhang Liu,
  • Haigang Wang,
  • Yuhua Liu,
  • Jianguo Zhu,
  • Qinggang Lyu,
  • Guoliang Song,
  • Shihao Zhang,
  • Dongxu Zhang

摘要

In order to thoroughly investigate the chemical reaction kinetic mechanism and comprehensively evaluate the combustibility indices and NOx emissions behaviors of preheated coal char in complex combustion reactions, both combustion thermal-kinetics and NOx emissions characteristics were experimentally investigated using the thermogravimetry-mass spectrometry (TG-MS) method. The combustion characteristics of raw coal and its char derived from preheating physicochemistry modification were comparatively investigated using the TG/DTG method. The emission characteristics of NH3, NO, and NO2 were quantitatively assessed through mass spectrometry measurement. The combustion chemical reaction rates were meticulously evaluated using both single scan rate and multiple scan rate approaches. Results indicated that with the increase of heating rate, the combustibility index and burnout index increased approximately. After preheating, the majority of volatiles and volatile nitrogen are released. Furthermore, during the combustion process, the respective emissions of NO, NO2, and NH3 reduced by approximately 25%, 30%, and 80%.