Effect of Functional Groups in Coal on the Depth of Adsorption Potential Well

Table 1

Statistics of potential well depth distribution in different metamorphic coal samples.

Types of coal samples	(%)	Distribution ratio of potential well depth (%)
		15~20 kJ/mol	10~15 kJ/mol	5~10 kJ/mol	0~5 kJ/mol
Anthracite	3.1	24.84	35.98	17.19	22.00
Lean coal	2.1	18.19	27.29	25.43	29.10
Coking coal	1.3	3.88	23.88	32.62	39.62
Brown coal	0.4	1.94	9.26	41.74	47.06