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. 2023 Sep 7;8(37):34059–34076. doi: 10.1021/acsomega.3c05059

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© 2023 The Authors. Published by American Chemical Society

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Experimental process. (a) Analysis on mineral basis of coal: Vario EL cube ultimate analyzer, WS-G818 Automatic proximate analyzer, and Rigaku Smartlab X-ray diffractometer. (b) Acidization reaction of coal. (c–g) Experimental analysis of chemical and pore structure of coal samples before and after acidization: Vario EL cube ultimate analyzer, Nicolet 6700 Fourier transform infrared spectrometer, Zeiss Sigma 300 scanning electron microscope, Micromeritics AutoPore V 9620 high-performance automatic mercury porosimeter, and Autosorb IQ3 automatic surface area and porosity analyzer, respectively. (h) Experimental analysis of methane adsorption and desorption of coal before and after acidification: BSD-PH automatic high temperature and high pressure gas adsorption instrument.