Research Article

Multicomponent Lattice Boltzmann Simulations of Gas Transport in a Coal Reservoir with Dynamic Adsorption

Table 1

Input parameters in simulation.

Simulation domain ()16 × 16

Temperature (K)303.15
Reservoir pressure (MPa)10
Pressure gradient (MPa/m)0.1
The viscosity of methane (Pa·s)1.39 × 10−6
Concentration at inlet (mol/m3)0.1
Matrix porosity 0.05~0.4
The diffusion coefficient of free flow region (m2/s)1.59 × 10−5
Knudsen diffusion coefficient (m2/s)1.69 × 10−6
0.0016
Saturation adsorption amount (m3/t)10~30
Adsorption rate constant (m3/(mol·s))1.0 × 103
Desorption rate constant (/s)3.78 × 107
Langmuir pressure (MPa)1~4

Note that relevant parameters were selected from typical geologic exploration data of the Qinshui Basin in China [28]. The adsorption and desorption rate constants were referred from the literature [29, 30].