NDLI: Measurement of CO$_{2}$ solubility in cyanide anion based ionic liquids; [c$_{4}$mim][SCN], [c$_{4}$mim][N(CN)$_{2}$], [c$_{4}$mim][C(CN)$

Content Provider	Springer Nature Link
Author	Kim, Ji Eun Kang, Jeong Won Lim, Jong Sung
Copyright Year	2014
Abstract	To investigate the effect of cyanide ions on the solubility of CO$_{2}$ in ionic liquid, we measured the solubility of CO$_{2}$ in three ionic liquids which contain three different numbers of cyanide anions, 1-butyl-3-methylimidazolium thiocyanate ([c$_{4}$mim][SCN]), 1-butyl-3-methylimidazolium dicyanamide ([c$_{4}$mim][N(CN)$_{2}$]) and 1-butyl-3-methylimidazolium tricyanomethanide ([c$_{4}$mim][C(CN)$_{3}$]). The solubility of CO$_{2}$ in ionic liquids was determined by measuring bubble-point pressure in high-pressure variable-volume view cell at temperatures from 303.15 to 373.15 K in 10 K intervals. The measured data were correlated with the Peng-Robinson equation of state (PR-EoS) using the van der Waals one fluid mixing rules. The critical properties and acentric factor of ionic liquids were estimated by using the modified Lydersen-Joback-Reid method. As a result, the calculated data were relatively well agreed with the experimental results and, as is commonly known, the solubility of CO$_{2}$ was observed to increase with increasing pressure and with decreasing temperature. The results also show that the highest solubility was obtained by [c$_{4}$mim][C(CN)$_{3}$] among those three experimented ionic liquids while [c$_{4}$mim][SCN] had the lowest. This implies that the CO$_{2}$ solubility is affected by the number of cyanide anions contained in ionic liquid. From this result, it is concluded that the cyanide anion enhances the CO$_{2}$ solubility in ionic liquid and that the ionic liquid which contains more cyanide anions has higher CO$_{2}$ solubility.
Starting Page	1678
Ending Page	1687
Page Count	10
File Format	PDF
ISSN	02561115
Journal	Korean Journal of Chemical Engineering
Volume Number	32
Issue Number	8
e-ISSN	19757220
Language	English
Publisher	Springer US
Publisher Date	2015-04-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ionic Liquids Solubility Carbon Dioxide Cyanide Anion Carbon Capture Industrial Chemistry/Chemical Engineering Catalysis Materials Science Biotechnology
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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