Thermodynamic Characteristics of Methane Adsorption of Coal with Different Initial Gas Pressures at Different Temperatures

Table 1

Proximate analysis, porosity, and vitrinite reflectance of the coal samples.

Coal sample	Ro,max	Porosity (%)	Mad (%)	Ad (%)	Volatile matter
					Vad (%)	Vdaf (%)
#1 (Gucheng)	2.26	8.52	1.05	10.14	11.82	13.35
#2 (Gaohe)	2.02	9.17	1.08	8.69	14.02	15.52