Supported bicyclic amidine ionic liquids as a potential CO2/N2 separation medium

doi:10.1016/j.memsci.2018.08.012

Title: Supported bicyclic amidine ionic liquids as a potential CO₂/N₂ separation medium

Abstract

In this paper, five new room temperature ionic liquids were tested as supported ionic liquid membranes (SILMs) for CO₂/N₂ separation capability. This series of ionic liquids (ILs) contains bicyclic amidine cations of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) or 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) with small alkyl chain substituents. These ILs have been synthesized to examine the effects of cation structure on free volume. Relevant physical and chemical properties have been examined, including CO₂ solubility and viscosity. The relationship between fractional free volume and permeability of gases is explored, with an interesting note on solubility. Each cation was paired with two different anions: bis(trifluoromethanesulfonyl)imide and tetracyanoborate, for further investigation of the cation-anion interaction on SILM permeability and selectivity. Finally, three of these new ILs have exceeded Robeson's upper bound for CO₂/N₂ gas separations.

Authors:

Schott, Jennifer A. ^[1];

^[1]; Mahurin, Shannon M. ^[2]; Tian, Ziqi ^[3]; Onishi, Nicole C. ^[3];

^[3]; Dai, Sheng ^[4]

Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemistry. Joint Inst. for Advanced Materials
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
Univ. of California, Riverside, CA (United States). Dept. of Chemistry
Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemistry. Joint Inst. for Advanced Materials; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division

Publication Date:: 2018-08-14

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1468162

Alternate Identifier(s):: OSTI ID: 1693501

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Membrane Science

Additional Journal Information:: Journal Volume: 565; Journal ID: ISSN 0376-7388

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; ionic liquid; carbon dioxide; free volume; SILM

Citation Formats


                    Schott, Jennifer A., Do-Thanh, Chi-Linh, Mahurin, Shannon M., Tian, Ziqi, Onishi, Nicole C., Jiang, De-en, and Dai, Sheng. Supported bicyclic amidine ionic liquids as a potential CO2/N2 separation medium.  United States: N. p., 2018. 
        Web.  doi:10.1016/j.memsci.2018.08.012.

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                    Schott, Jennifer A., Do-Thanh, Chi-Linh, Mahurin, Shannon M., Tian, Ziqi, Onishi, Nicole C., Jiang, De-en, & Dai, Sheng. Supported bicyclic amidine ionic liquids as a potential CO2/N2 separation medium.  United States.  doi:10.1016/j.memsci.2018.08.012.

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                    Schott, Jennifer A., Do-Thanh, Chi-Linh, Mahurin, Shannon M., Tian, Ziqi, Onishi, Nicole C., Jiang, De-en, and Dai, Sheng. Tue .  
        "Supported bicyclic amidine ionic liquids as a potential CO2/N2 separation medium".  United States.  doi:10.1016/j.memsci.2018.08.012.  https://www.osti.gov/servlets/purl/1468162.

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@article{osti_1468162,

  title        = {Supported bicyclic amidine ionic liquids as a potential CO2/N2 separation medium},

  author       = {Schott, Jennifer A. and Do-Thanh, Chi-Linh and Mahurin, Shannon M. and Tian, Ziqi and Onishi, Nicole C. and Jiang, De-en and Dai, Sheng},

  abstractNote = {In this paper, five new room temperature ionic liquids were tested as supported ionic liquid membranes (SILMs) for CO2/N2 separation capability. This series of ionic liquids (ILs) contains bicyclic amidine cations of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) or 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) with small alkyl chain substituents. These ILs have been synthesized to examine the effects of cation structure on free volume. Relevant physical and chemical properties have been examined, including CO2 solubility and viscosity. The relationship between fractional free volume and permeability of gases is explored, with an interesting note on solubility. Each cation was paired with two different anions: bis(trifluoromethanesulfonyl)imide and tetracyanoborate, for further investigation of the cation-anion interaction on SILM permeability and selectivity. Finally, three of these new ILs have exceeded Robeson's upper bound for CO2/N2 gas separations.},

  doi          = {10.1016/j.memsci.2018.08.012},

  journal      = {Journal of Membrane Science},

  number       = ,

  volume       = 565,

  place        = {United States},

  year         = {2018},

  month        = {8}

}

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DOI: 10.1016/j.memsci.2018.08.012

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Works referencing / citing this record:

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European Journal of Inorganic Chemistry, Vol. 2019, Issue 31
DOI: 10.1002/ejic.201900403

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