Contribution of Ash Content Related to Methane Adsorption Behaviors of Bituminous Coals

Figure 6

Characteristic curves for methane on (a) A1, (b) A2, (c) A3, (d) A4, (e) A5, (f) A6, (g) A7, and (h) A8 at 298 K, 313.15 K, and 328.15 K, respectively.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)