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

Table 4

Adsorption time of #1 coal sample.

Initial free gas pressure (MPa)	Temperature (°C)	Adsorption time (min)
1.145	30	101.7
	40	111.9
	50	118.7
	60	119.1
	70	126.7
	80	138.4
	90	145.6
0.821	30	107.3
	40	110.7
	50	120.2
	60	123.4
	70	132.5
	80	148.3
	90	144.1
0.630	30	109.9
	40	115.4
	50	123.3
	60	121.4
	70	144.6
	80	139.8
	90	153.8
0.445	30	110.1
	40	92.2
	50	96.4
	60	104.2
	70	118.8
	80	113.6
	90	130.8
0.305	30	115.4
	40	120.2
	50	125.6
	60	137.4
	70	136.3
	80	148.6
	90	159.0
0.190	30	122.5
	40	130.6
	50	131.0
	60	133.0
	70	141.4
	80	153.7
	90	163.8