Study of the Effect of Drying on the Pore Structure and Rate of Oxygen Consumption and Heat Release of Immersed Lignite

Table 4

Pore volume ratios for different pore sizes of raw coal and saturated coal after drying.

Raw coal	<10 nm	10–100 nm	100–1000 nm	>1000 nm	Saturated dry coal	<10 nm	10–100 nm	100–1000 nm	>1000 nm
	Pore volume ratio (%)					Pore volume ratio (%)
1-1-Rc	4.4	41.8	0.0	53.8	1-1-ad-8 h	2.3	20.5	0.0	77.2
1-2-Rc	4.1	39.4	0.0	56.5	1-2-ad-8 h	1.7	15.0	0.0	83.4
1-3-Rc	0.7	6.4	3.9	89.0	1-3-ad-8 h	0.9	8.3	7.9	82.9
2-1-Rc	3.1	32.3	0.0	64.6	2-1-ad-24 h	1.1	10.8	1.1	87.1
2-2-Rc	4.6	33.3	0.0	62.1	2-2-ad-24 h	1.0	6.8	2.6	89.5
2-3-Rc	3.8	31.2	0.0	65.0	2-3-ad-24 h	1.6	11.7	1.8	84.9
3-1-Rc	3.9	44.1	0.0	52.0	3-1-ad-48 h	1.1	10.8	4.9	83.2
3-2-Rc	2.3	24.6	0.0	73.2	3-2-ad-48 h	2.1	18.7	10.8	68.4
3-3-Rc	5.1	56.3	0.0	38.6	3-3-ad-48 h	2.5	22.6	6.8	68.0