离子液体热力学参数研究及其在伊犁煤直接液化中的应用

离子液体的相关热力学数据是离子液体设计合成及进一步应用的基础。本题选取咪唑类系列离子，探讨不同阴阳离子组成离子液体的溶解度参数、无限稀释活度系数等热力学性质参数变化规律。通过建立反相气相色谱测定煤热力学参数的方法，探索不同类型煤的热力学参数范围。依据"溶解度相近原则"，提出了溶解度参数与煤相近的溶剂对煤具有更大溶胀效率的热力学判据，并通过煤的溶胀度及直接液化效果进行验证。本题所关注的是离子液体组成与其热力学性质变化的规律，及其在煤直接液化中的应用。研究成果不仅可以为煤化工研究提供热力学基础数据，还可为离子液体在其它化工领域的研究应用提供理论基础。

The thermodynamic properties of ionic liquids (ILs) are the base of their design synthesis and further applications. The thermodynamic parameters, including solubility parameters and activity coefficients at infinite dilution, were systematically determined for the different imidazole ILs with varying ion composition. The thermodynamic parameters of different type of coals were also studied by means of inverse gas chromatography to determine their thermodynamic parameter range. According to the theory of "like dissolves like", the IL which has similar solubility parameter with coal can dissolve the coal preferably, and the effect of dissolving will be verified by the degree of coal swelling and the effect of direct liquefaction. The objective of this work is to obtain the rules on the thermodynamic properties of ILs varied with their ion composition, as well as the effect of different ILs on the coal direct liquefaction applications. The results will be helpful not only for the providing of theoretical thermodynamic in the application of coal-to-chemicals projects, but also for the process design of other chemical engineering fields