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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 31, Number 1
BKCSDE 31(1)
January 20, 2010

Title	CO₂ Solubilities in Amide-based Brønsted Acidic Ionic Liquids
Author	Jelliarko Palgunadi, Jinkyu Im, Je Eun Kang, Hoon Sik Kim, Minserk Cheong
Keywords	Brønsted acidic ionic liquids, Amide-based ionic liquids, Carbon dioxide, Solubility
Abstract	A distinguished class of hydrophobic ionic liquids bearing a Brønsted acidic character derived from amide-like compounds were prepared by a neutralization reaction of N,N-diethylformamide, N,N-dibutylformamide, 1-formylpiperidine, and ε-caprolactam with trifluoroacetic acid and physical absorptions of CO₂ in these ionic liquids were demonstrated and evaluated. CO₂ 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 CO₂ 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.
Page	146 - 150
Full Text	PDF

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