High solubilities of small hydrocarbons in trihexyl tetradecylphosphonium bis (2, 4, 4-trimethylpentyl) phosphinate

Xiangyang Liu, Waheed Afzal, Guangren Yu, Maogang He, John M Prausnitz

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Experimental solubilities are reported for methane, ethane,
ethylene, propane, and propylene in trihexyl tetradecylphosphonium bis(2,4,4-
trimethylpentyl) phosphinate [P(14)666][TMPP] from 313 to 353 K up to 6.7
MPa. A literature review on solubilities of small hydrocarbons in ionic liquids
shows that solubilities in [P(14)666][TMPP] are appreciably larger than those in
other ionic liquids. Contrary to solubilities in ionic liquids studied earlier,
solubilities of paraffins (ethane and propane) in [P(14)666][TMPP] are larger
than those of the corresponding olefins (ethylene and propylene). Because, at fixed
temperature, the vapor pressure of an olefin is larger than that of the
corresponding paraffin, the relative volatility of the olefin exceeds that of the
corresponding paraffin, contrary to the relative volatility observed in conventional
extractive distillation with polar solvents where the volatility of the paraffin exceeds
that of the corresponding olefin.
Original languageEnglish
Pages (from-to)10534-10539
Number of pages6
JournalThe Journal of Physical Chemistry B
Volume117
Issue number36
DOIs
Publication statusPublished - 15 Aug 2013

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Solubility
Hydrocarbons
Paraffins
Olefins
Ethane
Ionic liquids
Propane
Propylene
Ethylene
Vapor pressure
Distillation
Methane

Keywords

  • High Solubilities
  • Small Hydrocarbons
  • Iconic liquids

Cite this

High solubilities of small hydrocarbons in trihexyl tetradecylphosphonium bis (2, 4, 4-trimethylpentyl) phosphinate. / Liu, Xiangyang; Afzal, Waheed; Yu, Guangren; He, Maogang; Prausnitz, John M.

In: The Journal of Physical Chemistry B, Vol. 117, No. 36, 15.08.2013, p. 10534-10539.

Research output: Contribution to journalArticle

Liu, Xiangyang ; Afzal, Waheed ; Yu, Guangren ; He, Maogang ; Prausnitz, John M. / High solubilities of small hydrocarbons in trihexyl tetradecylphosphonium bis (2, 4, 4-trimethylpentyl) phosphinate. In: The Journal of Physical Chemistry B. 2013 ; Vol. 117, No. 36. pp. 10534-10539.
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AU - Prausnitz, John M

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AB - Experimental solubilities are reported for methane, ethane,ethylene, propane, and propylene in trihexyl tetradecylphosphonium bis(2,4,4-trimethylpentyl) phosphinate [P(14)666][TMPP] from 313 to 353 K up to 6.7MPa. A literature review on solubilities of small hydrocarbons in ionic liquidsshows that solubilities in [P(14)666][TMPP] are appreciably larger than those inother ionic liquids. Contrary to solubilities in ionic liquids studied earlier,solubilities of paraffins (ethane and propane) in [P(14)666][TMPP] are largerthan those of the corresponding olefins (ethylene and propylene). Because, at fixedtemperature, the vapor pressure of an olefin is larger than that of thecorresponding paraffin, the relative volatility of the olefin exceeds that of thecorresponding paraffin, contrary to the relative volatility observed in conventionalextractive distillation with polar solvents where the volatility of the paraffin exceedsthat of the corresponding olefin.

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