Effect of Ionic Liquid Surfactants on Coal Oxidation and Structure

Table 3

Apparent activation energy of all coal samples at different temperature stages.

Coal samples	Temperature stage (°C)	Slope (μ)	Activation energy E (kJ/mol)
IL-untc	29∼138	−703.8842	5.852
	138∼202	−7957.1828	66.156
[HOEtMIm][NTf2]-mc	29∼142	−707.3674	5.881
	142∼202	−8818.3745	73.316
[HOEtMIm][BF4]-mc	29∼148	−712.4438	5.923
	148∼202	−8503.6591	70.699
[N8,8,8,1]Cl-mc	29∼142	−707.3674	5.881
	142∼202	−13328.9997	110.817
[N2,2,2,2]Cl-mc	29∼144	−709.0960	5.895
	144∼202	−8510.3021	70.755
[C12MIm]Br-mc	29∼142	−707.3674	5.881
	142∼202	−8786.3594	73.050
[C14MIm]Br-mc	29∼144	−709.0960	5.895
	144∼202	−9206.9153	76.546