High CO 2 solubility, permeability and selectivity in ionic liquids with the tetracyanoborate anion

Shannon M. Mahurin; Patrick C. Hillesheim; Joshua S. Yeary; De En Jiang; Sheng Dai

doi:10.1039/c2ra22342b

High CO ₂ solubility, permeability and selectivity in ionic liquids with the tetracyanoborate anion

Shannon M. Mahurin, Patrick C. Hillesheim, Joshua S. Yeary, De En Jiang, Sheng Dai

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Abstract

Five different ionic liquids containing the tetracyanoborate anion were synthesized and evaluated for CO ₂ separation performance. Measured CO ₂ solubility values were exceptionally high compared to analogous ionic liquids with different anions and ranged from 0.128 mol L ^-1 atm ^-1 to 0.148 mol L ^-1 atm ^-1. In addition, CO ₂ permeability and CO ₂/N ₂ selectivity values were measured using a supported ionic liquid membrane architecture and the separations performance of the ionic liquid membranes exceeded the Robeson upper bound. These results establish the distinct potential of ionic liquids with the tetracyanoborate, [B(CN) ₄], anion for the separation of CO ₂.

Original language	English
Pages (from-to)	11813-11819
Number of pages	7
Journal	RSC Advances
Volume	2
Issue number	31
DOIs	https://doi.org/10.1039/c2ra22342b
State	Published - Dec 7 2012

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title = "High CO 2 solubility, permeability and selectivity in ionic liquids with the tetracyanoborate anion",

abstract = "Five different ionic liquids containing the tetracyanoborate anion were synthesized and evaluated for CO 2 separation performance. Measured CO 2 solubility values were exceptionally high compared to analogous ionic liquids with different anions and ranged from 0.128 mol L -1 atm -1 to 0.148 mol L -1 atm -1. In addition, CO 2 permeability and CO 2/N 2 selectivity values were measured using a supported ionic liquid membrane architecture and the separations performance of the ionic liquid membranes exceeded the Robeson upper bound. These results establish the distinct potential of ionic liquids with the tetracyanoborate, [B(CN) 4], anion for the separation of CO 2.",

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AU - Mahurin, Shannon M.

AU - Hillesheim, Patrick C.

AU - Yeary, Joshua S.

AU - Jiang, De En

AU - Dai, Sheng

PY - 2012/12/7

Y1 - 2012/12/7

N2 - Five different ionic liquids containing the tetracyanoborate anion were synthesized and evaluated for CO 2 separation performance. Measured CO 2 solubility values were exceptionally high compared to analogous ionic liquids with different anions and ranged from 0.128 mol L -1 atm -1 to 0.148 mol L -1 atm -1. In addition, CO 2 permeability and CO 2/N 2 selectivity values were measured using a supported ionic liquid membrane architecture and the separations performance of the ionic liquid membranes exceeded the Robeson upper bound. These results establish the distinct potential of ionic liquids with the tetracyanoborate, [B(CN) 4], anion for the separation of CO 2.

AB - Five different ionic liquids containing the tetracyanoborate anion were synthesized and evaluated for CO 2 separation performance. Measured CO 2 solubility values were exceptionally high compared to analogous ionic liquids with different anions and ranged from 0.128 mol L -1 atm -1 to 0.148 mol L -1 atm -1. In addition, CO 2 permeability and CO 2/N 2 selectivity values were measured using a supported ionic liquid membrane architecture and the separations performance of the ionic liquid membranes exceeded the Robeson upper bound. These results establish the distinct potential of ionic liquids with the tetracyanoborate, [B(CN) 4], anion for the separation of CO 2.

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ER -

High CO ₂ solubility, permeability and selectivity in ionic liquids with the tetracyanoborate anion

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