Effect of Analytical Particle Size on Pore Structure of High Volatile Bituminous Coal and Anthracite Using Low-Pressure N2 and CO2 Adsorption
Table 1
Basic characteristics of the coal samples with different particle sizes.
Sample
Particle size range, mm
Proximate analysis
Maceral composition
RO, %
Coal rank
Mad, %
Ad, %
Vdaf, %
V, %
I, %
V/I
Coal XJ
0.50–1.00
2.74
22.04
28.93
73.00
27.00
2.7
0.883
High volatile bituminous coal
0.25–0.50
2.46
13.46
26.02
59.92
40.08
1.5
0.125–0.250
2.55
12.59
26.85
55.40
44.60
1.2
0.063–0.125
2.43
11.78
26.68
51.04
48.96
1.1
0.032–0.063
2.36
15.54
24.96
44.49
55.51
0.8
Coal GZ
0.50–1.00
3.86
8.42
5.64
93.00
7.00
13.3
2.622
Anthracite
0.25–0.50
4.97
10.22
6.10
88.45
11.55
7.7
0.125–0.250
5.09
11.03
5.58
87.72
12.28
7.2
0.063–0.125
5.00
13.16
7.07
84.42
15.58
5.4
0.032–0.063
4.93
17.23
10.06
79.37
20.63
3.9
Ro = mean vitrinite reflectance in oil immersion; Mad = moisture content on air-dry basis; Ad = ash yield on dry basis; Vdaf = volatile matter yield on dry and ash-free basis; V = vitrinite content; I = inertinite content; V/I = ratio of vitrinite content to inertinite content.
