High resolution TEM image analysis of anthracite coal microcrystalline structure

LEI Lei; XIANG Jian-hua; ZENG Fan-gui; DENG Xiao-peng

doi:10.1016/S1872-5813(21)60050-6

Volume 49 Issue 6

Jun. 2021

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LEI Lei, XIANG Jian-hua, ZENG Fan-gui, DENG Xiao-peng. High resolution TEM image analysis of anthracite coal microcrystalline structure[J]. Journal of Fuel Chemistry and Technology, 2021, 49(6): 742-751. doi: 10.1016/S1872-5813(21)60050-6

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LEI Lei, XIANG Jian-hua, ZENG Fan-gui, DENG Xiao-peng. High resolution TEM image analysis of anthracite coal microcrystalline structure[J]. Journal of Fuel Chemistry and Technology, 2021, 49(6): 742-751. doi: 10.1016/S1872-5813(21)60050-6

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High resolution TEM image analysis of anthracite coal microcrystalline structure

doi: 10.1016/S1872-5813(21)60050-6

1.
Department of Geoscience and Engineering, Key Laboratory of Coal and Coal-measure Gas Geology in Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China
2.
Shanxi Institute of Energy, Jinzhong 030600, China

Funds: The project was supported by National Natural Science Foundation of China (41572144, U1910204, 41973077), Applied Basic Research Fund of ShanXi Province (201601D021137)

More Information

Corresponding author: E-mail: xiangjianhua@tyut.edu.cn
Received Date: 2020-12-24
Rev Recd Date: 2021-01-27

Available Online: 2021-03-30

Publish Date: 2021-06-30

Abstract

Abstract

Four HRTEM images of Yangquan No. 3 anthracite were quantitatively characterized, including fringe length, orientation and stacking distribution. The result indicates that the fringe characteristics are consistent with the coal rank characteristics of anthracite. The fringe of three different microcrystalline regions in image 1 was statistically analyzed. In region 1, the average fringe length is 0.87 nm, the overall fringe orientation distribution is disorderly, but there is still a small range of orderly arrangement between the short fringes and between the long fringes, and the maximum number of stacking layers is 4; In region 3, the fringe length is 1.01 nm on average, the orientation is higher in the range of 135°−180° with a ratio of 62.46%, and the maximum number of stacking layers can reach 6. The fringe distribution characteristic of region 2 is between 1 and 3. Most of the fringes are curved, and there may be heterocyclic rings and aliphatic rings. The FT-IR and ¹³C NMR data show that the aliphatic structure mainly exists in the form of aliphatic rings, which plays an important role in the process of forming long fringes by short fringes.
- HRTEM,
- anthracite coal,
- lattice fringe,
- microcrystalline structure

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References(28)

References

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