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

Table 2

Methane gas quality calibration data.

Pressure (MPa)	Compression factor	Methane quality (g)	Free peak area
3.74	0.9287	0.795377431	24809.298
2.67	0.9545	0.552474752	18358.782
1.65	0.9726	0.335063242	11596.887
0.92	0.9834	0.184771392	6733.107
0.75	0.9856	0.150292627	5810.072
0.32	0.9935	0.063614953	2834.298