Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Solubility of Carbon Dioxide in Strongly Basic Ionic Liquid

  • Sung, Jun-Kyung (Climate Change Technology Research Division, Korea Institute of Energy Research) ;
  • Kim, Sung-Hyun (Department of Chemical Engineering, Korea University) ;
  • Cheong, Min-Serk (Department of Chemistry and Research Institute for Basic Sciences, Kyung Hee University) ;
  • Baek, Il-Hyun (Climate Change Technology Research Division, Korea Institute of Energy Research)
  • Received : 2010.06.15
  • Accepted : 2010.08.11
  • Published : 2010.10.20
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Abstract

For the purpose of developing advanced new absorbents for carbon dioxide, ionic liquids (ILs) are considered as alternative materials due to their superior properties to conventional organic solvents. Since low $CO_2$ solubility in ionic liquids is a major concern for their application as absorbents, it is essential to focus on improving $CO_2$ absorbing capability of ILs. In this paper, strongly basic ionic liquids, namely [$C_n$-mim]OPh (n = 2, 4, 6), have been synthesized and studied over a wide range of temperature and pressure changes. [$C_n$-mim]OPh can be easily synthesized from corresponding [$C_n$-mim]Cl and sodium phenoxide and has been found to be good $CO_2$ absorbents.

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