Department of Physical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
J Phys Chem B. 2010 Dec 16;114(49):16542-7. doi: 10.1021/jp109469s. Epub 2010 Nov 22.
The activity coefficients at infinite dilution γ(13)(∞) and gas−liquid partition coefficients K(L) for 43 solutes—alkanes, alkenes, alkynes, cycloalkanes, aromatic hydrocarbons, alcohols, carboxylic acids, thiophene, ethers, ketones, and water—in the ionic liquid 1-decyl-3-methylimidazolium tetracyanoborate ([dmim][TCB]) were determined by gas−liquid chromatography at temperatures from 318.15 to 378.15 K. The partial molar excess Gibbs energies ΔG(1)(E,∞), enthalpies ΔH(1)(E,∞), and entropies ΔS(1)(E,∞) at infinite dilution were calculated from the experimental γ(13)(∞) values obtained over the temperature range. Additionally, the densities for investigated ionic liquid over the temperature range were determined. The selectivities for the aliphatic/aromatic hydrocarbon separation problem were calculated from γ(13)(∞) and compared to the literature values for N-methyl-2-pyrrolidinone (NMP) and sulfolane. It was found that the investigated [dmim][TCB] ionic liquid shows much higher capacity than NMP and sulfolane and selectivity on the same level as NMP and lower than that for sulfolane for the separation of aliphatic hydrocarbons from aromatic hydrocarbons.
在 318.15 至 378.15 K 的温度下，通过气相色谱法测定了 43 种溶质（烷烃、烯烃、炔烃、环烷烃、芳烃、醇、羧酸、噻吩、醚、酮和水）在离子液体 1-癸基-3-甲基咪唑四氰硼酸盐([dmim][TCB])中的无限稀释活度系数γ(13)(∞)和气液分配系数 K(L)。从实验测定的γ(13)(∞)值，在整个温度范围内计算了无限稀释时的偏摩尔过剩吉布斯自由能ΔG(1)(E,∞)、焓ΔH(1)(E,∞)和熵ΔS(1)(E,∞)。此外，还测定了所研究的离子液体在整个温度范围内的密度。从γ(13)(∞)计算了用于脂肪族/芳烃分离问题的选择性，并与 N-甲基-2-吡咯烷酮 (NMP) 和环丁砜的文献值进行了比较。结果表明，所研究的[dmim][TCB]离子液体在分离脂肪烃和芳烃时，具有比 NMP 和环丁砜更高的容量和选择性，与 NMP 相当，而选择性比环丁砜低。
