Solubility of CO2 in dialkylimidazolium dialkylphosphate ionic liquids

Jelliarko Palgunadi; Je Eun Kang; Dinh Quan Nguyen; Jin Hyung Kim; Byoung Koun Min; Sang Deuk Lee; Honggon Kim; Hoon Sik Kim

doi:10.1016/j.tca.2009.04.022

Solubility of CO₂ in dialkylimidazolium dialkylphosphate ionic liquids

Jelliarko Palgunadi, Je Eun Kang, Dinh Quan Nguyen, Jin Hyung Kim, Byoung Koun Min, Sang Deuk Lee, Honggon Kim, Hoon Sik Kim

GREEN SCHOOL (Graduate School of Energy and Environment)

Research output: Contribution to journal › Article › peer-review

103 Citations (Scopus)

Abstract

The solubility of carbon dioxide in room temperature ionic liquids (RTILs), dialkylimidazolium dialkylphosphates, was measured at 313-333 K and at pressures close to atmospheric pressure, from which Henry's law coefficients, standard Gibbs free energy, enthalpy, and entropy changes of solvation were derived. The CO₂ solubility in the dialkylimidazolium dialkylphosphate was found to increase with increasing chain length of the alkyl groups on the cation and/or the anion as was similarly found in other RTILs. Among various dialkylimidazolium dialkylphosphates tested, 1-ethyl-3-methylimidazolium diethylphosphate ([EMIM][Et₂PO₄]) and 1-butyl-3-methylimidazolium dibutylphosphate ([BMIM][Bu₂PO₄]) exhibited the comparable or better capability of dissolving CO₂ in comparison with that of [BMIM][BF₄], but their absorption capacities were still lower than that of 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIM][Tf₂N]).

Original language	English
Pages (from-to)	94-98
Number of pages	5
Journal	Thermochimica Acta
Volume	494
Issue number	1-2
DOIs	https://doi.org/10.1016/j.tca.2009.04.022
Publication status	Published - 2009 Oct 10

Keywords

CO capture
Dialkylimidazolium dialkylphosphate
Ionic liquids

ASJC Scopus subject areas

Instrumentation
Condensed Matter Physics
Physical and Theoretical Chemistry

Access to Document

10.1016/j.tca.2009.04.022

Cite this

@article{e211ada6236d49faab5b6a04787c7353,

title = "Solubility of CO2 in dialkylimidazolium dialkylphosphate ionic liquids",

abstract = "The solubility of carbon dioxide in room temperature ionic liquids (RTILs), dialkylimidazolium dialkylphosphates, was measured at 313-333 K and at pressures close to atmospheric pressure, from which Henry's law coefficients, standard Gibbs free energy, enthalpy, and entropy changes of solvation were derived. The CO2 solubility in the dialkylimidazolium dialkylphosphate was found to increase with increasing chain length of the alkyl groups on the cation and/or the anion as was similarly found in other RTILs. Among various dialkylimidazolium dialkylphosphates tested, 1-ethyl-3-methylimidazolium diethylphosphate ([EMIM][Et2PO4]) and 1-butyl-3-methylimidazolium dibutylphosphate ([BMIM][Bu2PO4]) exhibited the comparable or better capability of dissolving CO2 in comparison with that of [BMIM][BF4], but their absorption capacities were still lower than that of 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIM][Tf2N]).",

keywords = "CO capture, Dialkylimidazolium dialkylphosphate, Ionic liquids",

author = "Jelliarko Palgunadi and Kang, {Je Eun} and Nguyen, {Dinh Quan} and Kim, {Jin Hyung} and Min, {Byoung Koun} and Lee, {Sang Deuk} and Honggon Kim and Kim, {Hoon Sik}",

note = "Funding Information: This work was financially supported by National Energy Resources Technology Development R&D Program for Greenhouse Gas Mitigation under the Korea Ministry of Knowledge Economy. We also thank Mr. Arenst Andreas for his helpful discussion in obtaining thermodynamic data. ",

year = "2009",

month = oct,

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doi = "10.1016/j.tca.2009.04.022",

language = "English",

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journal = "Thermochimica Acta",

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T1 - Solubility of CO2 in dialkylimidazolium dialkylphosphate ionic liquids

AU - Palgunadi, Jelliarko

AU - Kang, Je Eun

AU - Nguyen, Dinh Quan

AU - Kim, Jin Hyung

AU - Min, Byoung Koun

AU - Lee, Sang Deuk

AU - Kim, Honggon

AU - Kim, Hoon Sik

N1 - Funding Information: This work was financially supported by National Energy Resources Technology Development R&D Program for Greenhouse Gas Mitigation under the Korea Ministry of Knowledge Economy. We also thank Mr. Arenst Andreas for his helpful discussion in obtaining thermodynamic data.

PY - 2009/10/10

Y1 - 2009/10/10

N2 - The solubility of carbon dioxide in room temperature ionic liquids (RTILs), dialkylimidazolium dialkylphosphates, was measured at 313-333 K and at pressures close to atmospheric pressure, from which Henry's law coefficients, standard Gibbs free energy, enthalpy, and entropy changes of solvation were derived. The CO2 solubility in the dialkylimidazolium dialkylphosphate was found to increase with increasing chain length of the alkyl groups on the cation and/or the anion as was similarly found in other RTILs. Among various dialkylimidazolium dialkylphosphates tested, 1-ethyl-3-methylimidazolium diethylphosphate ([EMIM][Et2PO4]) and 1-butyl-3-methylimidazolium dibutylphosphate ([BMIM][Bu2PO4]) exhibited the comparable or better capability of dissolving CO2 in comparison with that of [BMIM][BF4], but their absorption capacities were still lower than that of 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIM][Tf2N]).

AB - The solubility of carbon dioxide in room temperature ionic liquids (RTILs), dialkylimidazolium dialkylphosphates, was measured at 313-333 K and at pressures close to atmospheric pressure, from which Henry's law coefficients, standard Gibbs free energy, enthalpy, and entropy changes of solvation were derived. The CO2 solubility in the dialkylimidazolium dialkylphosphate was found to increase with increasing chain length of the alkyl groups on the cation and/or the anion as was similarly found in other RTILs. Among various dialkylimidazolium dialkylphosphates tested, 1-ethyl-3-methylimidazolium diethylphosphate ([EMIM][Et2PO4]) and 1-butyl-3-methylimidazolium dibutylphosphate ([BMIM][Bu2PO4]) exhibited the comparable or better capability of dissolving CO2 in comparison with that of [BMIM][BF4], but their absorption capacities were still lower than that of 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIM][Tf2N]).

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