To achieve efficient and clean coal combustion, catalytic combustion technology has received widespread attention. This paper systematically studied the influence of calcium-based compounds on the thermal reactivity and gas–solid two-phase product evolution behavior of different coal using TG-MS and FTIR analysis, combining kinetics and thermodynamics methods, the catalytic coal mechanism was discussed. Results demonstrated that both catalysts improved the combustion reactivity, the burnout temperatures of lignite, bituminous coal and anthracite were reduced by 30.75 °C, 53 °C and 25.5 °C respectively with CaO, as well as decreased by 24.75 °C, 55.5 °C and 29 °C respectively with CaCl. Meanwhile, it was worth noting that the activation energy of three coals was also reduced. CaCl was more likely to bind with the C = O functional group on the surface of coal, forming CO-Ca complexes, resulting in a decrease in the content of C = O and C-O. While CaO tended to absorb volatile matter, causing local overheating and promoting the breakage of side chains and bridge bonds. Besides, the calcium-based compounds advanced the gas evolution peak of combustion and the emissions of CO, NO and SO were effectively controlled. These results aimed at providing a new reference direction for further industrial development of clean coal combustion technology.

中文翻译：

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煤催化燃烧过程中的热反应性和气固产物演化：实验研究


为了实现煤炭高效清洁燃烧，催化燃烧技术受到广泛关注。本文利用TG-MS和FTIR分析系统研究了钙基化合物对不同煤的热反应性和气固两相产物演化行为的影响，结合动力学和热力学方法，探讨了煤的催化机理。结果表明，两种催化剂均提高了燃烧反应活性，CaO使褐煤、烟煤和无烟煤的燃尽温度分别降低了30.75℃、53℃和25.5℃，并降低了24.75℃、55.5℃。和 29 °C 分别用 CaCl。同时值得注意的是，三种煤的活化能也有所降低。 CaCl更容易与煤表面的C=O官能团结合，形成CO-Ca络合物，导致C=O和C-O含量减少。而CaO往往会吸收挥发性物质，导致局部过热并促进侧链和桥键的断裂。此外，钙基化合物还提前了燃烧的放气峰值，有效控制了CO、NO和SO的排放。这些成果旨在为洁净煤燃烧技术的进一步产业化发展提供新的参考方向。