Effects of Oxygen Element and Oxygen-Containing Functional Groups on Surface Wettability of Coal Dust with Various Metamorphic Degrees Based on XPS Experiment

Table 2

Data of XPS full spectrum scan of coal samples with different metamorphic grades.

Coal samples	Atomic concentration of elements/%				(O/C) ratio/%
	C 1s	O 1s	N 1s	S 2p	Elemental analysis	XPS analysis
Beizao lignite	80.34	18.22	1.44	/	20.61	22.68
Daliuta long flame coal	84.37	14.17	0.94	0.52	16.02	16.80
Yushuwan gas coal	87.68	11.5	0.82	/	12.03	13.12
Xinjulong fat coal	89.11	8.88	1.72	0.29	7.15	9.97
Wugou coking coal	88.41	9.08	1.83	0.68	5.50	10.27
Yangquan anthracite	89.18	9.05	1.34	0.43	2.52	10.15