The structural characteristics and macromolecular model of lignite are important for its effective utilization. In this paper, Yunnan (YN) lignite was taken as the study object, and deashing pretreatment was carried out to remove the influence of minerals in lignite before spectroscopic analysis. Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and
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Meng et al. (2024) studied this question.
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