Citation: LI Xia, ZENG Fan-gui, SI Jia-kang, WANG Wei, DONG Kui, CHENG Li-yuan. High resolution TEM image analysis of coals with different metamorphic degrees[J]. Journal of Fuel Chemistry and Technology, ;2016, 44(3): 279-286. shu

High resolution TEM image analysis of coals with different metamorphic degrees

Key Laboratory of Coal Science & Technology, Ministry of Education & Shanxi Province, Department of Earth Science & Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Corresponding author: ZENG Fan-gui, zengfangui@tyut.edu.cn
Received Date: 21 October 2015
Revised Date: 29 December 2015

Fund Project: Shanxi Province Coal Based Key Scientific and Technological Projects MQ2014-01National Natural Science Foundation of China 41402137National Natural Science Foundation of China 41302127

Figures(6)

The structural characteristics of 3 coals with different metamorphic degrees were analyzed using high-resolution transmission electron microscopy (HRTEM). Applying FFT-IFFT method, in association with Matlab, Arcgis and AutoCAD softwares, the lattice fringe parameters obtained from HRTEM image were determined using image analysis. The results indicate that the lattice fringes of all the test coal samples exhibit different characteristics. These lattice fringes can be divided into 8 types (1×1-8×8 aromatic fringes) according to the fringe length distribution. Taking the 3×3 aromatic fringe as critical point, the sample ML-8 abundant in 1×1 and 2×2 aromatic fringes while short of 3×3-8×8 aromatic fringes when comparing with sample DP-4 and sample XM-3. The values of d₀₀₂ obtained from both HRTEM and XRD show a decreasing trend with increasing vitrinite reflectance.
- different metamorphic degree of coal,
- high resolution transmission electron microscopy,
- image analysis
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