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摘要: 采用高分辨率透射电镜-数字图像分析技术HRTEM-DI研究了焦炭微晶结构。焦炭微晶结构参数中的长度、曲率和倾角，可分别用来表达焦炭微晶大小、微晶片层的有序度和微晶堆砌有序度。提出的表征焦炭微晶大小和有序度的结晶指数，能够很好地反映焦炭微晶结晶程度对反应性的影响。Abstract: The coke microcrystalline texture was studied by a high resolution transmission electron microscopy combined with digital image analytical technique (HRTEM-DI). The length, inclination angle and curvature characterization parameters of coke microcrystalline texture may be used to express the size of coke microcrystal, the order degree of microcrystalline lamellar and the order degree of microcrystalline stacking. The developed crystallographic index which is used to characterize the size and order degree could better reflect the effect of coke crystallinity on the coke reactivity.
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Key words:
- coke /
- microcrystalline texture /
- HRTEM /
- digital image analysis /
- crystallographic index /
- reactivity
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图 1 焦炭HRTEM照片经过降噪处理的微晶片层条纹像
Figure 1 Coke HRTEM high-resolution photos after noise reduction of microchip slice streaks
图 5 焦炭反应性与晶格条纹长度和曲率的关系
Figure 5 Relationship between lattice size and thermal properties of coke
图 6 晶格大小与焦炭热性质的关系图
Figure 6 Relationship between lattice size and thermal properties of coke
表 1 煤样的主要性能
Table 1 Main properties of coal samples
Coal sample Proximate analysis w/% Optical property /% Maceral composition /% Mad Ad Vd St, d Rr V I E M Q9 2.11 7.56 37.19 0.65 0.72 68.73 20.60 9.35 1.32 F6 1.86 9.70 29.76 0.76 0.94 72.69 23.60 0.82 2.89 J13 1.95 9.33 24.23 0.53 1.17 80.44 15.50 0.21 3.85 S1 0.89 9.24 16.04 0.38 1.63 55.80 42.80 0.00 1.40 
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表 2 煤样的黏结性和焦炭性能指标
Table 2 Coal caking index and coke property index
Sample Coal caking index Coal caking index G Y /mm B /mm DI15150 CRI CSR Q9 84 14.5 101 75.2 31.3 51.7 F6 90 24.0 210 81.2 25.6 58.4 J13 94 18.0 215 80.3 14.5 67.8 S1 56 8.0 -11 70.1 24.6 50.3
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表 3 焦炭HRTEM微晶结构参数的平均值
Table 3 HRTEM micro-parameters of coke samples
Sample L/nm S/% CI CQ9 0.654 0.152 97.00 CF6 0.622 0.057 135.13 CJ13 0.874 0.874 210.12 CS1 0.720 0.720 143.33
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