A one-dimensional transient single coal particle combustion model was proposed to investigate the characteristics of single coal particle combustion in both O₂/N₂ and O₂/CO₂ atmospheres under the fluidized bed combustion condition. The model accounted for the fuel devolatilization, moisture evaporation, heterogeneous reaction as well as homogeneous reactions integrated with the heat and mass transfer from the fluidized bed environment to the coal particle. This model was validated by comparing the model prediction with the experimental results in the literature, and a satisfactory agreement between modeling and experiments proved the reliability of the model. The modeling results demonstrated that the carbon conversion rate of a single coal particle (diameter 6 to 8 mm) under fluidized bed conditions (bed temperature 1088 K) in an O₂/CO₂ (30:70) atmosphere was promoted by the gasification reaction, which was considerably greater than that in the O₂/N₂ (30:70) atmosphere. In addition, the surface and center temperatures of the particle evolved similarly, no matter it is under the O₂/N₂ condition or the O₂/CO₂ condition. A further analysis indicated that similar trends of the temperature evolution under different atmospheres were caused by the fact that the strong heat transfer under the fluidized bed condition overwhelmingly dominated the temperature evolution rather than the heat release of the chemical reaction.

为了研究O ₂ / N ₂和O ₂ / CO ₂两种条件下单煤颗粒燃烧的特性，提出了一种一维瞬时单煤颗粒燃烧模型。流化床燃烧条件下的气氛。该模型考虑了燃料脱挥发分，水分蒸发，非均相反应以及均相反应，以及从流化床环境到煤颗粒的热量和质量传递。通过将模型预测与文献中的实验结果进行比较，验证了该模型的有效性，建模与实验之间的令人满意的一致性证明了该模型的可靠性。模拟结果表明，气化反应促进了单个煤颗粒（直径6至8 mm）在O ₂ / CO ₂（30:70）气氛下在流化床条件（床温1088 K）下的碳转化率。，这比O中的要大得多₂ / N ₂（30:70）气氛。另外，无论是在O ₂ / N ₂条件下还是在O ₂ / CO ₂条件下，颗粒的表面和中心温度都类似地演变。进一步的分析表明，在不同的气氛下，温度变化的趋势相似，这是由于在流化床条件下的强传热以绝对多数而不是化学反应的放热主导了这一事实。