Experimental Study on Reasonable Adsorption Time in Determination Coalbed Methane Content

Table 5

Methane adsorption constants of different coal samples in different adsorption time.

Adsorption time/h	WYY		WYR		PY		PR		QFY		QFR
	4	32.36	1.57	34.36	1.21	31.85	1.03	30.58	0.81	24.51	1.41	26.67	1.13
8	33.67	1.59	35.71	1.12	32.79	1.03	32.79	0.79	25.51	1.39	27.17	1.07
12	36.36	1.54	37.59	1.13	33.44	0.95	33.67	0.76	25.84	1.33	27.78	1.05
16	38.76	1.53	38.02	1.08	34.34	0.97	35.97	0.72	26.32	1.37	27.93	1.06
20	39.53	1.51	39.68	1.12	35.84	0.91	36.49	0.69	26.59	1.39	28.01	1.02
24	40.65	1.53	41.67	1.08	36.11	0.93	38.75	0.71	27.11	1.35	28.49	1.03