An improved method for characterizing coal metamorphism by XRD

Authors

WANG Chao, Center for Modern Analysis and Computing, China University of Mining and Technology, Xuzhou 221116, China
ZHAO Younan, Institute of Chemical Engineering, China University of Mining and Technology, Xuzhou 221116, China
WANG Zhenwei, Center for Modern Analysis and Computing, China University of Mining and Technology, Xuzhou 221116, China
LU Zhaolin, Center for Modern Analysis and Computing, China University of Mining and Technology, Xuzhou 221116, China

Abstract

At present, the X-ray measurement method of coal metamorphism has the problem that the γ band is not well divided, the δ peak information is not used, and the background of the bottom is unreasonable. The X-ray diffraction pattern of coal with different metamorphosed degrees is compared and studied. It is proposed to correct the metamorphic coefficient formula by using the information of the slope of the 002 peak, the extended half-height width and the δ peak without deducting the so-called background information. The calculation of the XRD patterns of coal samples with different degrees of metamorphism is verified. The method can better express the degree of metamorphism of coal, avoid the problem that the γ band is not well divided, the δ peak effective information is not used, and the background is unreasonable. It is a simple, feasible and accurate measure of coal metamorphism. The method of degree is recommended to be promoted in the industry.

Keywords

coal, degree of deterioration, X-ray diffraction, metamorphic coefficient

DOI

10.3969/j.issn.1001-1986.2019.06.007

Recommended Citation

WANG Chao, ZHAO Younan, WANG Zhenwei, et al. (2019) "An improved method for characterizing coal metamorphism by XRD," Coal Geology & Exploration: Vol. 47: Iss. 6, Article 8.
DOI: 10.3969/j.issn.1001-1986.2019.06.007
Available at: https://cge.researchcommons.org/journal/vol47/iss6/8

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