Relationship between fluorescence characteristics of coal macerals and excitation time

ZHANG Ya-ru; BAI Jin-feng; JIN Li-jun; LI Yang; HU Hao-quan

doi:10.1016/S1872-5813(23)60339-1

Volume 51 Issue 9

Sep. 2023

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ZHANG Ya-ru, BAI Jin-feng, JIN Li-jun, LI Yang, HU Hao-quan. Relationship between fluorescence characteristics of coal macerals and excitation time[J]. Journal of Fuel Chemistry and Technology, 2023, 51(9): 1209-1219. doi: 10.1016/S1872-5813(23)60339-1

Citation:

ZHANG Ya-ru, BAI Jin-feng, JIN Li-jun, LI Yang, HU Hao-quan. Relationship between fluorescence characteristics of coal macerals and excitation time[J]. Journal of Fuel Chemistry and Technology, 2023, 51(9): 1209-1219. doi: 10.1016/S1872-5813(23)60339-1

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Relationship between fluorescence characteristics of coal macerals and excitation time

doi: 10.1016/S1872-5813(23)60339-1

ZHANG Ya-ru^{1, 2
,},
BAI Jin-feng^2
,,
JIN Li-jun^1
,,
LI Yang^1
,,
HU Hao-quan^{1
,
,}

1.
State Key Laboratory of Fine Chemicals, Institute of Coal Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
2.
School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China

Funds: The project was supported by the National Key Research and Development Program of China (2016YFB0600301)

Received Date: 2022-11-16
Accepted Date: 2022-12-30
Rev Recd Date: 2022-12-29

Available Online: 2023-02-10

Publish Date: 2023-09-30

Abstract

Abstract

The fluorescence characteristics of coal macerals can be used as one of the indexes to evaluate the properties of coking coal. In this work, a single-wavelength laser with a wavelength of 360 nm was used as the excitation source to excite the surface of particulate block under a polarizing microscope. Effect of excitation time on fluorescence characteristics of the macerals was studied. The relationship between spontaneous fluorescence intensity and the excitation time of each maceral of six kinds of coking coals show that the fluorescence characteristics of coal macerals are related to the type and metamorphism of coal. The excitation time has a certain effect on the fluorescence parameters of the macerals. By comparing the relative fluorescence intensity values under different excitation times, it is found that the mean relative fluorescence intensity within 15 s can be used as an optical parameter to characterize the structure and metamorphic grade of different macerals. The essence of this method is to express movement of electrons in outer layer of nucleus by macroscopic fluorescence spectrum and relative fluorescence intensity of the initial state value and simplify microscopic complexity into macroscopic and numerical form generally accepted.
- coal,
- maceral,
- fluorescence characteristics,
- excitation time

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References(34)

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