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http://dx.doi.org/10.5012/bkcs.2010.31.01.146

CO2 Solubilities in Amide-based Brønsted Acidic Ionic Liquids  

Palgunadi, Jelliarko (Department of Chemistry and Research Institute of Basic Sciences, Kyung Hee University)
Im, Jin-Kyu (Department of Chemistry and Research Institute of Basic Sciences, Kyung Hee University)
Kang, Je-Eun (Department of Chemistry and Research Institute of Basic Sciences, Kyung Hee University)
Kim, Hoon-Sik (Department of Chemistry and Research Institute of Basic Sciences, Kyung Hee University)
Cheong, Min-Serk (Department of Chemistry and Research Institute of Basic Sciences, Kyung Hee University)
Publication Information
Bulletin of the Korean Chemical Society / v.31, no.1, 2010 , pp. 146-150 More about this Journal
Abstract
A distinguished class of hydrophobic ionic liquids bearing a Br${\o}$nsted acidic character derived from amide-like compounds were prepared by a neutralization reaction of N,N-diethylformamide, N,N-dibutylformamide, 1-formylpiperidine, and $\varepsilon$-caprolactam with trifluoroacetic acid and physical absorptions of $CO_2$ in these ionic liquids were demonstrated and evaluated. $CO_2$ solubilities in these ionic liquids were influenced by the molecular structure of the cation and were apparently increased with the molar volume. Comparison based on a volume unit reveals that $CO_2$ solubilities in these liquids are relatively higher than those in imidazolium-based ionic liquids. Henry's coefficients calculated from low-pressure solubility tests at 313 to 333 K were used to derive the thermodynamics quantities. Enthalpy and entropy of solvation may share equal contributions in solubility.
Keywords
Bronsted acidic ionic liquids; Amide-based ionic liquids; Carbon dioxide; Solubility;
Citations & Related Records
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Times Cited By Web Of Science : 2  (Related Records In Web of Science)
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