Vaporization behavior of tetraoctylphosphonium bis(2-ethylhexyl)phosphate ionic liquid

McMurray, J. W.; Zhou, Y.; Luo, H. M.; Qu, J.

doi:10.1016/j.cplett.2016.11.024

Title: Vaporization behavior of tetraoctylphosphonium bis(2-ethylhexyl)phosphate ionic liquid

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Abstract

We determined the equilibrium vapor pressures, p_e, of the ionic liquid tetraoctylphosphonium bis(2-ethylhexyl)phosphate ([P₈₈₈₈][DEHP]) over the temperature range 409–495 K using mass loss Knudsen effusion. The p_e versus temperature relationship compares well to 1-methyl-3-octylimidazolium bis(trifluoromethylsulfonyl)imide ([C₈mim][NTf₂]) but is lower than that of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C₂mim][NTf₂]) when measured using the same technique. Here, we determined the discrepancies between the p_e for [C₈mim][NTf₂] and [C₂mim][NTf₂] with previous studies is discussed. Finally, the enthalpy and entropy of vaporization for all three fluids are estimated from the Clasius-Clapeyron relation.

Authors:

^[1]; Zhou, Y. ^[1]; Luo, H. M. ^[1]; Qu, J. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Material Science and Technology Division

Publication Date:: Fri Nov 18 00:00:00 EST 2016

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

Sponsoring Org.:: USDOE Office of Nuclear Energy (NE), Fuel Cycle Technologies (NE-5); USDOE Office of Nuclear Energy (NE)

OSTI Identifier:: 1360050

Alternate Identifier(s):: OSTI ID: 1415246

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Chemical Physics Letters

Additional Journal Information:: Journal Volume: 667; Journal Issue: C; Journal ID: ISSN 0009-2614

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE

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                    McMurray, J. W., Zhou, Y., Luo, H. M., and Qu, J. Vaporization behavior of tetraoctylphosphonium bis(2-ethylhexyl)phosphate ionic liquid.  United States: N. p., 2016. 
Web.  doi:10.1016/j.cplett.2016.11.024.

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                    McMurray, J. W., Zhou, Y., Luo, H. M., & Qu, J. Vaporization behavior of tetraoctylphosphonium bis(2-ethylhexyl)phosphate ionic liquid.  United States.  https://doi.org/10.1016/j.cplett.2016.11.024

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                    McMurray, J. W., Zhou, Y., Luo, H. M., and Qu, J. Fri .  
"Vaporization behavior of tetraoctylphosphonium bis(2-ethylhexyl)phosphate ionic liquid".  United States.  https://doi.org/10.1016/j.cplett.2016.11.024.  https://www.osti.gov/servlets/purl/1360050.

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@article{osti_1360050,

  title        = {Vaporization behavior of tetraoctylphosphonium bis(2-ethylhexyl)phosphate ionic liquid},

  author       = {McMurray, J. W. and Zhou, Y. and Luo, H. M. and Qu, J.},

  abstractNote = {We determined the equilibrium vapor pressures, pe, of the ionic liquid tetraoctylphosphonium bis(2-ethylhexyl)phosphate ([P8888][DEHP]) over the temperature range 409–495 K using mass loss Knudsen effusion. The pe versus temperature relationship compares well to 1-methyl-3-octylimidazolium bis(trifluoromethylsulfonyl)imide ([C8mim][NTf2]) but is lower than that of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C2mim][NTf2]) when measured using the same technique. Here, we determined the discrepancies between the pe for [C8mim][NTf2] and [C2mim][NTf2] with previous studies is discussed. Finally, the enthalpy and entropy of vaporization for all three fluids are estimated from the Clasius-Clapeyron relation.},

  doi          = {10.1016/j.cplett.2016.11.024},

  journal      = {Chemical Physics Letters},

  number       = C,

  volume       = 667,

  place        = {United States},

  year         = {Fri Nov 18 00:00:00 EST 2016},

  month        = {Fri Nov 18 00:00:00 EST 2016}

}

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