State Key Laboratory of Fine Chemicals, Institute of Coal Chemical Engineering, School of Chemical Engineering, Dalian University of Technology
School of Chemical Engineering, University of Science and Technology Liaoning

本研究采用360 nm波长的单波长激光作为激发光源，在偏光显微镜下对煤光片进行激发，研究激发时间对显微组分荧光特征的影响。通过对六种炼焦煤各显微组分的荧光强度与激发时间的关系研究表明，煤岩显微组分的荧光特征与煤岩类型及变质程度有关；激发时间对各显微组分的荧光参数具有一定的影响。通过对比不同激发时间下的相对荧光强度，发现15 s内的平均相对荧光强度可作为表征不同显微组分的结构和变质程度的光学参数。该方法的实质是将原子核外层电子的运动状况通过宏观的荧光光谱和具体的相对荧光强度进行表达,使其微观上的复杂性简化为宏观上和数值上可以被人们普遍接受的形式。

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.

国家重点研发计划（2016YFB0600301）资助

张雅茹, 白金锋, 靳立军, 李扬, 胡浩权. 煤岩显微组分荧光特征与激发时间的关系[J]. 燃料化学学报（中英文）, 2023, 51(9): 1209-1219.

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.