Changes in Pore Structure of Coal Caused by CS₂ Treatment and Its Methane Adsorption Response

Table 3

Pore surface areas of the untreated and CS₂-treated coals.

Sample		Pore surface area (m^2/g)					Percentage of pore surface area (%)
		Haitian coal	Untreated	0.0207	0.0592	4.3972	11.4185	15.8956	0.1302	0.3725	27.6630	71.8340
CS2-treated	0.0242		0.0598	4.3316	11.9007	16.3162	0.1482	0.3663	26.5478	72.9375
Tucheng coal	Untreated	0.0234	0.0627	2.0713	3.7832	5.9406	0.3944	1.0548	34.8671	63.6843
	CS2-treated	0.0569	0.1080	2.3548	4.2405	6.7602	0.8419	1.5977	34.8331	62.7270
Yuni coal	Untreated	0.1013	0.1236	2.0826	4.0518	6.3593	1.5930	1.9430	32.7487	63.7150
	CS2-treated	0.1134	0.1303	2.1295	3.8570	6.2302	1.8199	2.0913	34.1803	61.9086
Linyuan coal	Untreated	0.0590	0.1189	2.3850	4.8200	7.3829	0.7997	1.6104	32.3044	65.2855
	CS2-treated	0.2332	0.2209	2.3362	4.1257	6.9160	3.3718	3.1943	33.7796	59.6543
Jinjia coal	Untreated	0.0823	0.0961	1.7635	3.3377	5.2796	1.5587	1.8202	33.4022	63.2197
	CS2-treated	0.0837	0.1058	1.7652	2.7978	4.7525	1.7616	2.2254	37.1424	58.8702

ma: macropore; me: mesopore; tr: transitional pore; mi: micropore; cu: cumulative pore.