期刊
IONICS
卷 29, 期 11, 页码 4659-4667出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-023-05195-5
关键词
Ionic liquids; CO2; Henry's law; Enthalpy; Entropy; Gibbs free energy
In this study, a series of nitrile imidazolium-based ionic liquids were prepared and characterized, and their effects on CO2 solubility were investigated. The thermodynamic properties of solvation were also calculated.
A series of nitrile imidazolium-based ionic liquids (ILs) incorporating benzyl ([C2CN Bzim]), hydroxyl ([C2CN Heim]), and allyl ([C2CN Ayim]) groups with the cation and dioctylsulfosuccinate ([DOSS]) anion were prepared and characterized using H-1, C-13 NMR, and elemental analysis, and the impurities such as moisture and halide content were determined. The CO2 solubility in the prepared ILs was measured using a gravimetric measurement technique at T = 25 to 70 degrees C and pressures P = 1 to 20 bar. Henry's law constant and the thermodynamic properties of solvation (enthalpy (Delta H-0), entropy (Delta S-0), and Gibbs free energy (Delta G(0))) were calculated from the experimental solubility data. The effect of the aforementioned functional groups on the CO2 solubility was discussed.
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