Journal
ENERGY & FUELS
Volume 31, Issue 2, Pages 1136-1146Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.6b02176
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [41372161]
- Program for Innovative Research Team (in Science and Technology) in University of Henan Province [17IRTSTHN025]
- Program for Innovative Research Team of Henan Polytechnic University [T2015-1]
Ask authors/readers for more resources
Metamorphism and deformation significantly affect the macromolecular structure of coal. In this study, experiments were conducted using coal samples with different metamorphic degrees and deformation types from different regions of Hebei, Henan, Shanxi, and Anhui province, followed by laser Raman spectral analysis. The results indicated that the Raman spectrum of all coal samples consist of two characteristic peaks, namely the D peak and the G peak, ranging from 1336.7 cm(-1) to 1360 cm(-1) and from 1591.2 cm(-1) to 1600.6 cm(-1), respectively. Simultaneously, with the metamorphic degree of coal increasing, certain change rules were observed in both strong and weak tectonically deformed coals: G and D peaks were gradually separated and the sharpness of these peaks was clearly enhanced. In addition, the D-peak position, full width at half maximum for the G-peak (fwhm-G), and the intensity ratio between the D and G-peaks (I-D/I-G) decreased, but the G-peak position and d(G-D) values increased, while the analysis results indicated that the change trends in the d(G-D) values can serve as a measure of the change trends in the metamorphic degree of coal. Meanwhile, tectonic deformation can somewhat promote the order degree of the aromatic structure in the internal microscopic structure of coal, and the effects of tectonic deformation on macromolecular structure of coal are even greater than those of high metamorphic stage in the low metamorphic stage.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available