为考察离子液体对煤中易氧化活性结构的溶解能力,选取两种阳离子含氧取代咪唑类离子液体[AOEmim]BF4和[HOEmim]BF4分别对煤进行预处理。利用原位傅里叶红外光谱仪（In-SituFTIR）测试了原煤与处理煤红外官能团谱图,分析结果显示：离子液体能破碎煤结构,且两种离子液体阳离子中的含氧基团能够与煤络合,生成羧基。对原煤和离子液体处理煤进行的热分析实验,结果显示：离子液体处理煤在低温时放热速率较快,而在超过250℃的高温阶段,放热速率明显减慢直至低于原煤的放热速率。[HOEmim]BF4处理煤放热速率降低远远早于[AOEmim]BF4处理煤。综合红外和热分析实验结果,解释了[HOEmim]BF4与煤相互作用机理。%Aiming to study the inhibiting oxidation effect of ionic liquid （IL） on coal, this study used two ionic liquids with imidazolium based cations substituted by different oxygen-containing groups, [ AOEmim ] BF4 and [ HOEmim ] BF4, to dissolve coal. The dissolving ability of the two ionic liquids for functional group in coal was studied by In-Situ Fourier Transform Infrared Spectroscopy （In-Situ FTIR）. The results show that the ionic liquid can dissolve coal and react with coal by complexion formation and create earboxyl. According to the thermo analysis experiment results, the [ AOEmim] BF4-pretrreated coal releases heat more quickly than the [ HOEmim ~ BF4 -pretreated coal does before 250 ℃. After 250 ℃, the exothermic rates of the two pretreated coal samples both reduce sharply. The exothermie rate of[ HOEmim] BF4 pretreated coal reduces more earlier than that of[ AOEmim] BF4 pretreated one. Synthesizing the FTIR and DSC results,the mechanism of interaction between the [ HOEmim] BF4 and coal was analyzed.
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