文献类型：期刊文献

英文题名：Insight into the Effect of Physicochemical Properties on CO2 Absorption Behavior of Imidazole Anion-Functionalized Ionic Liquids

作者：Wang, Jiani[1];He, Yuxing[1];Chen, Tingting[1];Xu, Yingjie[1];Chen, Bin[1]

机构：[1]Shaoxing Univ, Dept Chem, Shaoxing 312000, Peoples R China

年份：2023

外文期刊名：JOURNAL OF SOLUTION CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:001042537900001)、、EI(收录号：20242616339278)、Scopus(收录号：2-s2.0-85166938107)、WOS

基金：AcknowledgementsThis work was supported by the National Science Foundation of China (No. 21978172) and Undergraduate Scientific and Technological Innovation Project of Shaoxing University.

语种：英文

外文关键词：Ionic liquids; Imidazole-based anion; Physicochemical property; CO2 capture

外文摘要：Three imidazole anion-functionalized ionic liquids (IFILs) with tributylethylphosphonium ([P-4442](+)) cation and imidazolate ([Im](-)), 4-methylimidazolate ([4-MeIm](-)), or 4-bromimidazolate ([4-BrIm](-)) anions were prepared to study the effect of physicochemical properties on CO2 absorption behavior. Density (& rho;), viscosity (& eta;), and speed of sound (u) of the studied IFILs were measured, and molecular volume (V-m), standard entropy (S-0), lattice energy (U-POT), and isentropic compressibility coefficient (& kappa;(s)) were calculated accordingly. CO2 absorption behavior of [P-4442][Im] at T = 313.15-333.15 K and p = 0.2 and 1 bar was investigated as an example. The results show that with the increase of temperature, & rho;, & eta;, u, and U-POT decrease, while V-m, S-0, and & kappa;(s) increase, due to a decrease in electrostatic interaction correspondingly. The orders of & rho;, u, & eta;, V-m, and S-0 values are as follows: [P-4442][Im] < [P-4442][4-MeIm] < [P-4442][4-BrIm], while U-POT and & kappa;(s) are in reverse order. Interestingly, CO2 capture capacity of IFILs is approximately linear with & eta; or & kappa;(s). Due to low & eta; and high & kappa;(s), CO2 absorption capacity of [P-4442][Im] is almost independent of temperature and partial pressure, as high as 0.90 mol CO2/mol IL at 333.15 K and 0.2 bar, indicating that [P-4442][Im] has potential applications for CO2 absorption at high temperature and low pressure.