Measurement of infinite dilution activity coefficients of n-alkanes in 4-methyl-n-butylpyridinium tetrafluoroborate using gas–liquid chromatography

Inoue, Go; Iwai, Yoshio; Yasutake, Munehiro; Honda, Katsumi; Arai, Yasuhiko

doi:10.1016/j.fluid.2006.10.016

Cited by 24 publications

(21 citation statements)

References 21 publications

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“…7(a) and 7(b), the retention times were affected by the volume of samples. This tendency is in accordance to the polymer solute systems reported by Inoue et al [11] and that for sample sizes less than 0.1 µL, retention times were independent of sample volumes.…”

Section: Effect Of Sample Sizesupporting

confidence: 92%

“…The variation of γ i ∞ with temperature presented in Figs. 1 to 4 shows similar behavior to that obtained by Inoue et al [11].…”

Section: September 2010supporting

confidence: 88%

“…This is because the retention time is inversely proportional to the flow rate thus if the mobile phase flow rate is doubled the retention time, t R will be halved. However, Inoue et al [11] found that infinite dilution activity coefficients of n-alkanes in 4-methyl-n-butylpyridinium tetrafluoroborate were affected by the flow rate of the carrier gas.…”

Section: Effect Of Carrier Gas Flow Ratementioning

confidence: 99%

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Measurement of infinite dilution activity coefficients of selected environmentally important volatile organic compounds in polydimethylsiloxane using gas - liquid chromatography

Muzenda

Belaid

Ntuli

2010

Korean J. Chem. Eng.

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Silicon oil, chemically known as polydimethylsiloxane (PDMS), is a high boiling point solvent highly suitable for volatile organic compounds (VOCs) absorption. To use PDMS as an absorption solvent for a specific waste gas problem, it is important to determine the infinite dilution activity coefficients of the VOCs to be separated with PDMS. This work reports activity coefficients at infinite dilution of 13 VOCs in polydimethysiloxane determined by the dynamic gas liquid chromatographic technique. The measurements were carried out at various temperatures (303.15, 313.15, 323.15., 333.15, 353.15, 373.15, 393.15 and 423.15 K). Four PDMS polymers with average molecular weight ranging from 760 to 13,000 were used as solvents. A control column packed by Perkin Elmer to our specifications was used to validate the coating and packing methods. Flow rate dependence of the elution peaks was also investigated by varying it from 10-50 ml/min. Precision was improved by reproducing the results using columns with different liquid loading, thus also studying the retention mechanism. The results compare well with the data from previous work using simple headspace and UNIFAC predictions and literature values. The successful comparison gives an indication of the GLC as a rapid, simple and accurate method for studying the thermodynamics of the interaction of a volatile solute with a nonvolatile solvent.

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Section: Effect Of Sample Sizesupporting

confidence: 92%

“…The variation of γ i ∞ with temperature presented in Figs. 1 to 4 shows similar behavior to that obtained by Inoue et al [11].…”

Section: September 2010supporting

confidence: 88%

Section: Effect Of Carrier Gas Flow Ratementioning

confidence: 99%

See 1 more Smart Citation

Measurement of infinite dilution activity coefficients of selected environmentally important volatile organic compounds in polydimethylsiloxane using gas - liquid chromatography

Muzenda

Belaid

Ntuli

2010

Korean J. Chem. Eng.

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“…For the UNIFAC‐based model, the most important work is the determination of the group binary interaction parameters

α_{n m}

and

α_{m n}

by fitting the experimental activity coefficients at infinite dilution and VLE or the liquid‐liquid equilibria (LLE) data at finite concentration. Several versions of the original UNIFAC model for ILs, which are distinct from one another in the decomposition of the IL groups and the database used to fit the group binary interaction parameters, are listed in Supporting Information Table S2 . Alevizou et al revealed that the group binary interaction parameters obtained by fitting the experimental activity coefficients at infinite dilution and LLE can be extended to describe the VLE very well.…”

Section: Predictive Thermodynamic Modelsmentioning

confidence: 99%

Extractive distillation with ionic liquids: A review

et al. 2014

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Extractive distillation is commonly used for the separation of azeotropic or close-boiling mixtures in the chemical industry. During the past decade, the use of ionic liquids (ILs) as entrainers has received considerable attention due to their unique advantages when applied in extractive distillation. This work is devoted to providing an easy-to-read and comprehensive review on the recent progress made by chemical engineers, focusing on the issues of predictive thermodynamic models, structure-property relations, separation mechanisms, and process simulation and optimization. This review spans from the molecular level to the industrial scale, to provide a theoretical insight into the molecular interactions between ILs and the components to be separated. Moreover, a comprehensive database on the vapor-liquid equilibria (VLE) and activity coefficients at infinite dilution concerning ILs is provided as Supporting Information. Concluding remarks are made on the unsolved scientific issues with respect to this promising special distillation technology.

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“…In separation processes, the important properties of the solvent for different separation problems are selectivity and capacity, which can be directly calculated from the activity coefficients at infinite dilution (c 1 13 ) [1]. It is generally known that the structure of the cation and anion [3][4][5][6], and 4-methyl-N-butyl-pyridinium tosylate [bmPY][TOS] [7]. It is very important to undertake experiments on new ionic liquids based on other than imidazolium cations.…”

Section: Introductionmentioning

confidence: 99%

Activity coefficients at infinite dilution measurements for organic solutes and water in the ionic liquid 4-methyl-N-butyl-pyridinium bis(trifluoromethylsulfonyl)-imide

Domańska

Marciniak

2009

The Journal of Chemical Thermodynamics

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Measurement of infinite dilution activity coefficients of n-alkanes in 4-methyl-n-butylpyridinium tetrafluoroborate using gas–liquid chromatography

Cited by 24 publications

References 21 publications

Measurement of infinite dilution activity coefficients of selected environmentally important volatile organic compounds in polydimethylsiloxane using gas - liquid chromatography

Measurement of infinite dilution activity coefficients of selected environmentally important volatile organic compounds in polydimethylsiloxane using gas - liquid chromatography

Extractive distillation with ionic liquids: A review

Activity coefficients at infinite dilution measurements for organic solutes and water in the ionic liquid 4-methyl-N-butyl-pyridinium bis(trifluoromethylsulfonyl)-imide

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