Comprehensive Fractal Description of Porosity of Coal of Different Ranks

Table 4

Experimental results of pore volume of coal samples obtained by liquid nitrogen adsorption method.

Sample number	Pore volume (mL/g)				Pore volume ratio (%)
	𝑉2	𝑉3	𝑉4	𝑉𝑡	𝑉2/𝑉𝑡	𝑉3/𝑉𝑡	𝑉4/𝑉𝑡
Number 1	0.002571	0.003403	0.001164	0.007138	36.02	47.67	16.31
Number 2	0.00243	0.00291	0.000679	0.006019	40.37	48.35	11.28
Number 3	0.002068	0.005161	0.007531	0.01476	14.01	34.97	51.02
Number 4	0.001212	0.002502	0.003773	0.007487	16.19	33.42	50.39

Note: the subscript “4” is the pore volume of micropore (10 nm ≧ Φ > 2 nm) and others are same as Table 2.