Gasification kinetic analysis of three Shenhua bituminous coal samples with various particle size ranges were carried out at three different temperatures (1000, 950, and 900°C) for 30 min using the gasifying agent of CO₂ with the flow rate of 40 ml min⁻¹. The average particle sizes for sample A, sample B, and sample C were 43.4, 168, and 293 μm, respectively. Experimental results indicated that there were differences among the weight loss curves of three coal samples with different particle sizes. Furthermore, the differences became larger with the decrease of temperatures. Among the 11 used reaction mechanisms, two-dimensional growth of nuclei following the Avrami-Erofeev equation (A2) was proved to be the most appropriate one to fit the gasification data of Shenhua bituminous coal samples, as it can reconstruct gasification curves with high correlation coefficients (R² > 0.95). The calculated values of apparent activation energy (E) for sample A, sample B, and sample C were 95.9, 79.1, and 69.4 kJ mol⁻¹, respectively. It was also found that the particle size had significant influence on kinetic data. The apparent activation energy decreased when there was an increase of the particle size. The compensation relationship of E and A (apparent pre-exponential factor) was noted, and the fitted mathematic formula was lnA = 0.1041 E+0.540 28 (R² = 0.999).

中文翻译：

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等温热重分析神华烟煤CO2气化动力学

_{使用 CO 2}气化剂，流量为 40 ml min ^{- 1}. 样品 A、样品 B 和样品 C 的平均粒径分别为 43.4、168 和 293 μm。实验结果表明，三种不同粒径煤样的失重曲线存在差异。此外，随着温度的降低，差异变得更大。在所使用的11种反应机理中，Avrami-Erofeev方程（A2）的晶核二维生长被证明是最适合神华烟煤样品气化数据的一种，因为它可以重建具有高度相关性的气化曲线系数（R ²  > 0.95）。样品 A、样品 B 和样品 C的表观活化能 ( E ) 计算值为 95.9、79.1 和 69.4 kJ mol ^-1， 分别。还发现粒径对动力学数据有显着影响。随着粒径的增加，表观活化能降低。记下E和A（表观指前因子）的补偿关系，拟合数学公式为ln A  = 0.1041 E +0.540 28 (R ²  = 0.999)。