Underground coal gasification (UCG) is an important in situ conversion technology for the clean and efficient recovery of deep and difficult-to-mine coal resources. Reactions between high-temperature char and gasifying agents such as CO2 and H2O in the reduction zone directly control the generation of valuable gases, p...
Yu-Fei Zhang, Ji-Jun Tian, Shu-Guang Yang et al.· Fractal and Fractional· 0 citations
Maceral composition critically controls nanoscale pore structure and influences methane behavior in low-rank coal reservoirs, yet the role of individual macerals remains inadequately quantified. Therefore, vitrinite, semifusinite, and fusinite of low-rank coal were characterized by atomic force microscopy (AFM) and mic...
Xiao-Mei Zhang, Xin-Yu Chen, Subinuer Memet et al.· Fractal and Fractional· 0 citations
This study investigated how high-temperature reactive atmospheres associated with underground coal gasification (UCG) differentially modify the pore system of roof sandstone. Roof sandstone from the Shanghai Miao mining area, Inner Mongolia, was conditioned to simulate formation-water saturation and heat-treated at 200...
Jia-Qun Zou, Ji-Jun Tian, Da-Xing Wang et al.· Fractal and Fractional· 0 citations
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