956543.fig.007a
(a)
956543.fig.007b
(b)
956543.fig.007c
(c)
956543.fig.007d
(d)
956543.fig.007e
(e)
956543.fig.007f
(f)
956543.fig.007g
(g)
956543.fig.007h
(h)
Figure 7: Heat of adsorption ( ) for methane/coal systems against surface loading ( ) at various temperatures. ■, 298.15 K; , 313.15 K; and ▲, 328.15 K. (a) A1, (b) A2, (c) A3, (d) A4, (e) A5, (f) A6, (g) A7, and (h) A8.