含氧取代咪唑类离子液体影响煤结构及其氧化性质的实验研究

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\]BF 4和\HOEmim\]BF 4分别对煤进行预处理。利用原位傅里叶红外光谱仪(In-Situ FTIR)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\]BF 4处理煤放热速率降低远远早于\AOEmim\]BF 4处理煤。综合红外和热分析实验结果，解释了\HOEmim\]BF 4与煤相互作用机理。

Effect of ionic liquids with imidazolium based cations substituted by different oxygen-containing groups on coal oxidation

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,BF4 andBF4,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 carboxyl.According to the thermo analysis experiment results,theBF4-pretrreated coal releases heat more quickly than theBF4-pretreated coal does before 250 ℃.After 250 ℃,the exothermic rates of the two pretreated coal samples both reduce sharply.The exothermic rate ofBF4 pretreated coal reduces more earlier than that ofBF4 pretreated one.Synthesizing the FTIR and DSC results,the mechanism of interaction between theBF4 and coal was analyzed.