0 引言
1 煤等温吸附实验
1.1 实验煤样
1.2 实验原理
1.3 实验步骤
2 实验结果
2.1 等温吸附校正
表1 Langmuir拟合吸附等温线相关系数Table 1 Langmuir fitting adsorption isotherm phase relationship table |
温度 /K | Y-1煤样 | Y-2煤样 | ||||
---|---|---|---|---|---|---|
R 2 | R 2 | |||||
303 | 36.790 5 | 1.818 9 | 0.997 4 | 25.389 6 | 1.313 1 | 0.998 4 |
308 | 35.032 7 | 1.608 5 | 0.996 7 | 24.768 4 | 1.193 1 | 0.995 5 |
313 | 34.858 7 | 1.367 7 | 0.995 9 | 23.854 7 | 1.150 4 | 0.997 7 |
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2.2 等量吸附热计算与特征分析
表2 各组煤样等量吸附曲线相关参数Table 2 Correlation parameters of equivalent adsorption curves of coal samples in each group |
煤样 | 固定吸附量/(mL/g) | 平衡压力/MPa | ||
---|---|---|---|---|
303 K | 308 K | 313 K | ||
Y-1 | 22 | 1.01 | 1.28 | 1.72 |
24 | 1.14 | 1.47 | 2.00 | |
26 | 1.31 | 1.70 | 2.35 | |
28 | 1.51 | 1.99 | 2.80 | |
29 | 1.76 | 2.35 | 3.38 | |
Y-2 | 9 | 0.54 | 0.74 | 1.00 |
11 | 0.76 | 1.07 | 1.51 | |
13 | 1.05 | 1.55 | 2.35 | |
15 | 1.47 | 2.29 | 3.97 | |
17 | 2.10 | 4.02 | 8.38 |
图5 各组煤样不同吸附量对于LnP和1/T关系图5中22~29、9~11分别代表Y-1煤样、Y-2煤样固定吸附量,单位为mL/g,各直线代表等量吸附热线性拟合;P单位为Pa;1/T单位为10-3 K-1 Fig.5 Different adsorption capacities of coal samples for LnP and 1/T |
表3 各煤样等量吸附线方程及等量吸附热Table 3 Equal adsorption line equation and equal adsorption heat of each coal sample |
煤样 | 固定吸附量 /(mL/g) | 线性方程 | 相关系数 (R 2) | 等量吸附热 /(kJ/mol) |
---|---|---|---|---|
Y-1 | 22 | 0.965 9 | 21.120 3 | |
24 | 0.948 7 | 23.959 6 | ||
26 | 0.993 4 | 25.465 4 | ||
28 | 0.984 8 | 28.109 4 | ||
29 | 0.967 7 | 30.512 2 | ||
Y-2 | 9 | 0.991 0 | 16.139 0 | |
11 | 0.997 7 | 18.988 8 | ||
13 | 0.987 6 | 20.619 2 | ||
15 | 0.986 5 | 21.715 5 | ||
17 | 0.996 6 | 23.235 9 |
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