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This study was designed to illustrate how high-energy electron beam (HEEB) irradiation can be used to treat Gao Yang coking coal (GY) and Shui Yu fat coal (SY). The effects of different irradiation (5 kGy, 10 kGy, and 20 kGy) on coal quality characteristics and physical and chemical structure were also studied. The structure of the coal samples was characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). Industrial analysis results showed that irradiation of samples reduced the amount of moisture and ash. The dehydration rate of SY coal when using an irradiation of 20 kGy reached a maximum of 48.11%. XPS results showed that irradiation treatment could not directly remove organic sulfur, but it possibly transforms the thiophene sulfur (low valence state) in coal to sulfones (high valence state). The FTIR spectra showed that the side chain of fats and the C = C of aromatic hydrocarbons in the coal were destroyed during radiation. XRD spectra showed the inorganic mineral composition on the surface of coal samples changed. In addition, irradiation effectively improves the pore capacity and pore channel structure of coal samples, resulting in an apparent increase in the specific surface area.

Study on the modification of high energy electron beam irradiation of high sulfur coking coal