Data for characterization of the pore wetting process of equal-sized granular coals

In this paper, all measurement and calculation data and their preparation process are presented in detail, which supplements the information published in this co-submission are related to the article “Characterization of the Pore Wetting Process of Equal-Sized Granular Coals based on LF-NMR” [1]. This includes the preparation and component analysis of samples, surface contact angle measurement, analysis of original T(2) spectrum and wetting pore size distribution (W-PSD) conversion calculation process. Hence the reader can use the data for their validations and analysis. LF-NMR experiments were conducted for the granular coal pore wetting characterization at the large-diameter MacroMR12-150H-I imaging and analysis system, of Suzhou Niumai Corporation in Jiangsu Province, China. Combined with contact angle measurement, which used the JY-PHb contact angle test instrument, we analyzed the pore wetting process in porous media and its characterization method.