Insight into the separation mechanism of coal macerals by micro characterization and density functional theory calculation

High-temperature rheological behavior and non-isothermal pyrolysis mechanism of macerals separated from different coals

“…The vitrinite (IC-V, NC-V) and inertinite enrichments (IC-I, NC-I) of the two coals were get separately by the hydrothermal float-sink method as shown in Fig. 1(b), which was demonstrated systematically in our previous work [46]. The results of proximate, ultimate, and petrographic analyses of all samples are shown in Table 1, and it was found that IC and NC are coking coal and gas coal, respectively.…”

Fine Structure Characterization of Representative Coal-Bearing Rocks of the Late Carboniferous Taiyuan Formation in Huainan Coalfield: Combined SEM, FESEM, and μCT Techniques

“…Yao and Liu 36 compared the variability of MIP and constant-rate-controlled mercury porosimetry (CMP) experiments in terms of pore measurement, and proposed that CMP is an effective method that can provide much more detailed PSD information on macropores; however, it is deficient in analyzing mesopores of coals. Kuang et al 37 analyzed the apparent morphology, endogenous mineral and aromatic structural differences of macerals by SEM and high-resolution TEM (HRTEM), and elucidated the interaction between macerals and heavy liquids. Cheng et al 25 combined NMR and μCT to explore the compressibility of low-rank coals and the effects of different pore structures and minerals on their compressibility, which provided some guidance for the mining measures of CBM in low-rank coal reservoirs.…”