Page 355 - Fundamentals of Gas Shale Reservoirs

MS OF GAS ADSORPTION ON MINERALS 335
(a)
10

Amount adsorbed (mol/kg) 0.1 1 CH (NaX, at 288K)

4
(NaX, at 298K)
CH 4
CH (NaX, at 308K)
4
CH (NaX, at 328K)
4
2
(NaX, at 298K)
CO 2
(NaX, at 308K)
0.01 CO (NaX, at 288K)
CO 2
CO (NaX, at 328K)
2
1 10 100 1000 10,000
P (kPa)
(b)
1000

100
Density of CH 4 (mg/cm 3 ) 10 Bulk (NaX, 288K)

1

Bulk (NaX, 298K)
0.1
Bulk (NaX, 308K)
Bulk (NaX, 328K)
Adsorbed phase (NaX, 288K)
0.01 Adsorbed phase (NaX, 298K)
Adsorbed phase (NaX, 308K)
Adsorbed phase (NaX, 328K)
1 10 100 1000 10,000 10,0000
P (kPa)
FIGURE 15.8 MD simulation results of CH and CO adsorption on FAU zeolite: (a) Adsorption isotherm of CH and CO at different
4
2
2
4
temperatures (288, 298, 308, and 328 K) and (b) variations of densities of the adsorbed phase and bulk gas with pressure.

Z
X
Z
Y X
A
FIGURE 15.9 Molecular structure of coal with adsorbed CH and CO .
4 2