Table 1.
The industrial analysis results of three coalsa.
Fig 1.
The CO2 isothermal adsorption curves of three different degrees of coal metamorphism.
Fig 2.
The variation of CO2 saturation adsorption capacity of three different degrees of coal metamorphism.
Fig 3.
The variation of the Smic and Vmic in three different degrees of coal metamorphism.
Fig 4.
The micropore size distribution curves in three different degrees of coal metamorphism.
Fig 5.
The LTNA isotherms of three different degrees of coal metamorphism.
Fig 6.
The variation of liquid nitrogen saturation adsorption capacity of three different degrees of coal metamorphism.
Fig 7.
The variations of the Smeso and Vmeso in three different degrees of coal metamorphism.
Fig 8.
The mesopore size distribution curves in three different degrees of coal metamorphism.
Fig 9.
The curves of mercury intake and mercury withdrawal in three different degrees of coal metamorphism. (a) Lignite, (b) Coking coal, (c) Anthracite.
Fig 10.
The variation of the maximum mercury intake of three different degrees of coal metamorphism.
Fig 11.
The variations of the Smacro and Vmacro in three different degrees of coal metamorphism.
Fig 12.
The macropore size distribution curves in three different degrees of coal metamorphism.
Table 2.
Pore structure parameters of micropores, mesopores, and macropores in three different degrees of coal metamorphism.
Fig 13.
The isothermal adsorption and desorption curves of methane for coals with different degrees of metamorphism. (a) Lignite, (b) Coking coal, (c) Anthracite.
Table 3.
Methane desorption parameters of coals with different degrees of metamorphism.
Fig 14.
The mechanism of the influence of the spatial distribution form of micropores in coal on the desorption capacity of methane.