Research on Adsorption and Desorption Characteristics of Gas in Coal Rock Based on Nuclear Magnetic Resonance Technology

Table 4

Adsorption and desorption amount under different pressures.

Adsorption process			Desorption process
Balance pressure (MPa)	Free gas quality (g)	Adsorbed gas quality (g)	Balance pressure (MPa)	Adsorbed gas quality (g)	Free gas quality (g)
0.5	0.0161	0.0469	10.33	1.1012	0.3912
1.11	0.0334	0.1060	7.27	1.1485	0.2661
1.93	0.0581	0.1959	5.33	1.0424	0.1915
3.39	0.1097	0.3881	3.23	0.9430	0.1147
5.91	0.2017	0.5826	1.58	0.8588	0.0594
7.62	0.2776	0.8548	0.63	0.7906	0.0301
10.33	0.3912	1.1012