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

Figure 4

Methane adsorption isotherms obtained by applying the D-A model at 298 K, 313.15 K, and 328.15 K, respectively. (a) A1, (b) A2, (c) A3, (d) A4, (e) A5, (f) A6, (g) A7, and (h) A8; solid line, fitted by the D-A model.

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