State Key Laboratory of Materials-Oriented and Chemical Engineering and Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University , Nanjing 210009, China.
Energy Engineering, Division of Energy Science, Luleå University of Technology , 97187 Luleå, Sweden.
Langmuir. 2017 Oct 24;33(42):11719-11726. doi: 10.1021/acs.langmuir.7b02204. Epub 2017 Aug 31.
In this work, the CO absorption working capacity and solubility in ionic liquids immobilized into porous solid materials (substrates) were studied both experimentally and theoretically. The CO absorption working capacity in the immobilized ionic liquids was measured experimentally. It was found that the CO absorption working capacity and solubility increased up to 10-fold compared to that in the bulk ionic liquids when the film thickness was nearly 2.5 nm in the [HMIm][NTf] immobilized in the P25. Meanwhile, a new model was proposed to describe the Gibbs free energy of CO in the immobilized ionic liquids, and both macro- and microanalyses of the CO solubility in the confined ionic liquids were conducted. The theoretical investigations reveal that the substrate has a crucial effect on the gas solubility in the ionic liquid immobilized into the substrates, and the model performance was approved with a consideration of the substrate effect.
在这项工作中，我们从实验和理论两个方面研究了 CO 在固定于多孔固体材料（基质）中的吸收工作容量和溶解度。通过实验测量了固定化离子液体中的 CO 吸收工作容量。结果发现，当[HMIm][NTf]固定在 P25 中时，膜厚接近 2.5nm，与本体离子液体相比，CO 的吸收工作容量和溶解度提高了 10 倍。同时，提出了一个新的模型来描述固定化离子液体中 CO 的吉布斯自由能，对受限离子液体中 CO 溶解度进行了宏观和微观分析。理论研究表明，基质对固定于基质中的离子液体中气体溶解度有重要影响，考虑到基质的影响，模型性能得到了验证。
