Measurement of infinite dilution activity coefficients of alcohols, ketones, and aromatic hydrocarbons in 4-methyl-N-butylpyridinium tetrafluoroborate and 1-butyl-3-methylimidazolium hexafluorophosphate by gas-liquid chromatography

Yusuke Shimoyama, Takeshi Hirayama, Yoshio Iwai

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Abstract

The infinite dilution activity coefficients of C1 to C 5 alcohols, acetone, 2-butanone, acetylacetone, toluene, and xylene isomers in 4-methyl-N-butylpyridinium tetrafluoroborate ([bmpy][BF4]) and 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]) were measured by gas - liquid chromatography (GC) from (306.6 to 334.8) K and atmospheric pressure. In these measurements with GC, [bmpy][BF4] or [bmim][PF6] was used as a stationary phase. The infinite dilution activity coefficients in this work were not affected by the gas flow rate. It was found that the values of 1-propanol, 1-butanol, and 1-pentanol for the infinite dilution activity coefficients in [bmim] [PF6] were larger than those for their isomers. For xylene isomers, the activity coefficients of m-xylene are the largest. The effects of the cation and anion species composing ionic liquid on the activity coefficients were also investigated. The activity coefficients for alcohols, ketones, and aromatic hydrocarbons in the ionic liquids were affected by the anion species more strongly than the cation species of the ionic liquid. The partial molar excess enthalpies at infinite dilution for the solutes in ionic liquids were obtained from the temperature dependence of the infinite dilution activity coefficients. Moreover, the partial molar excess entropies were also calculated from the enthalpies. The excess enthalpy and entropy contributions to the activity coefficients in ionic liquid were investigated.

Original languageEnglish
Pages (from-to)2106-2111
Number of pages6
JournalJournal of Chemical and Engineering Data
Volume53
Issue number9
DOIs
Publication statusPublished - Sep 2008

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Aromatic Hydrocarbons
Aromatic hydrocarbons
Activity coefficients
Liquid chromatography
Ketones
Gas chromatography
Dilution
Ionic Liquids
Alcohols
Ionic liquids
Xylene
Isomers
Enthalpy
Xylenes
Anions
Cations
Entropy
Negative ions
Positive ions
1-Propanol

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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title = "Measurement of infinite dilution activity coefficients of alcohols, ketones, and aromatic hydrocarbons in 4-methyl-N-butylpyridinium tetrafluoroborate and 1-butyl-3-methylimidazolium hexafluorophosphate by gas-liquid chromatography",
abstract = "The infinite dilution activity coefficients of C1 to C 5 alcohols, acetone, 2-butanone, acetylacetone, toluene, and xylene isomers in 4-methyl-N-butylpyridinium tetrafluoroborate ([bmpy][BF4]) and 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]) were measured by gas - liquid chromatography (GC) from (306.6 to 334.8) K and atmospheric pressure. In these measurements with GC, [bmpy][BF4] or [bmim][PF6] was used as a stationary phase. The infinite dilution activity coefficients in this work were not affected by the gas flow rate. It was found that the values of 1-propanol, 1-butanol, and 1-pentanol for the infinite dilution activity coefficients in [bmim] [PF6] were larger than those for their isomers. For xylene isomers, the activity coefficients of m-xylene are the largest. The effects of the cation and anion species composing ionic liquid on the activity coefficients were also investigated. The activity coefficients for alcohols, ketones, and aromatic hydrocarbons in the ionic liquids were affected by the anion species more strongly than the cation species of the ionic liquid. The partial molar excess enthalpies at infinite dilution for the solutes in ionic liquids were obtained from the temperature dependence of the infinite dilution activity coefficients. Moreover, the partial molar excess entropies were also calculated from the enthalpies. The excess enthalpy and entropy contributions to the activity coefficients in ionic liquid were investigated.",
author = "Yusuke Shimoyama and Takeshi Hirayama and Yoshio Iwai",
year = "2008",
month = "9",
doi = "10.1021/je800246v",
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pages = "2106--2111",
journal = "Journal of Chemical & Engineering Data",
issn = "0021-9568",
publisher = "American Chemical Society",
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TY - JOUR

T1 - Measurement of infinite dilution activity coefficients of alcohols, ketones, and aromatic hydrocarbons in 4-methyl-N-butylpyridinium tetrafluoroborate and 1-butyl-3-methylimidazolium hexafluorophosphate by gas-liquid chromatography

AU - Shimoyama, Yusuke

AU - Hirayama, Takeshi

AU - Iwai, Yoshio

PY - 2008/9

Y1 - 2008/9

N2 - The infinite dilution activity coefficients of C1 to C 5 alcohols, acetone, 2-butanone, acetylacetone, toluene, and xylene isomers in 4-methyl-N-butylpyridinium tetrafluoroborate ([bmpy][BF4]) and 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]) were measured by gas - liquid chromatography (GC) from (306.6 to 334.8) K and atmospheric pressure. In these measurements with GC, [bmpy][BF4] or [bmim][PF6] was used as a stationary phase. The infinite dilution activity coefficients in this work were not affected by the gas flow rate. It was found that the values of 1-propanol, 1-butanol, and 1-pentanol for the infinite dilution activity coefficients in [bmim] [PF6] were larger than those for their isomers. For xylene isomers, the activity coefficients of m-xylene are the largest. The effects of the cation and anion species composing ionic liquid on the activity coefficients were also investigated. The activity coefficients for alcohols, ketones, and aromatic hydrocarbons in the ionic liquids were affected by the anion species more strongly than the cation species of the ionic liquid. The partial molar excess enthalpies at infinite dilution for the solutes in ionic liquids were obtained from the temperature dependence of the infinite dilution activity coefficients. Moreover, the partial molar excess entropies were also calculated from the enthalpies. The excess enthalpy and entropy contributions to the activity coefficients in ionic liquid were investigated.

AB - The infinite dilution activity coefficients of C1 to C 5 alcohols, acetone, 2-butanone, acetylacetone, toluene, and xylene isomers in 4-methyl-N-butylpyridinium tetrafluoroborate ([bmpy][BF4]) and 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]) were measured by gas - liquid chromatography (GC) from (306.6 to 334.8) K and atmospheric pressure. In these measurements with GC, [bmpy][BF4] or [bmim][PF6] was used as a stationary phase. The infinite dilution activity coefficients in this work were not affected by the gas flow rate. It was found that the values of 1-propanol, 1-butanol, and 1-pentanol for the infinite dilution activity coefficients in [bmim] [PF6] were larger than those for their isomers. For xylene isomers, the activity coefficients of m-xylene are the largest. The effects of the cation and anion species composing ionic liquid on the activity coefficients were also investigated. The activity coefficients for alcohols, ketones, and aromatic hydrocarbons in the ionic liquids were affected by the anion species more strongly than the cation species of the ionic liquid. The partial molar excess enthalpies at infinite dilution for the solutes in ionic liquids were obtained from the temperature dependence of the infinite dilution activity coefficients. Moreover, the partial molar excess entropies were also calculated from the enthalpies. The excess enthalpy and entropy contributions to the activity coefficients in ionic liquid were investigated.

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