Comprehensive Fractal Description of Porosity of Coal of Different Ranks

Table 2

Experimental results of pore volume for coal samples obtained using mercury intrusion method.

Sample number	Pore volume (mL/g)					Pore volume ratio (%)
	𝑉1	𝑉2	𝑉3	𝑉4	𝑉𝑡	𝑉1/𝑉𝑡	𝑉2/𝑉𝑡	𝑉3/𝑉𝑡	𝑉4/𝑉𝑡
Number 1	0.0024	0.0066	0.0121	0.0092	0.0303	7.92	21.78	39.93	30.36
Number 2	0.0067	0.0071	0.0098	0.0086	0.0322	20.81	22.05	30.43	26.71
Number 3	0.0032	0.0027	0.0116	0.0095	0.027	11.85	10.00	42.96	35.19
Number 4	0.0007	0.001	0.0084	0.0086	0.0187	3.74	5.35	44.92	45.99

Note: the subscript “𝑡” is total pore, “1” is macropore (Φ > 1000 nm), “2” is mesopore (1000 nm ≧ Φ > 100 nm), “3” is transition pore (100 nm ≧ Φ > 10 nm), and “4” is micropore (10 nm ≧ Φ > 5.5 nm).