Determination of Infinite Dilution Activity Coefficient in Ethanol-Water-Salt Systems Using Spme-Gc-Fid

Measurements of Infinite Dilution Activity Coefficients of Alkanols in the Ionic Liquid Tributylmethylammonium Methyl Sulfate Using HS-SPME/GC/FID

“…Information about solute–solvent interactions is of extreme importance to the separation process. Both the activity coefficient at infinite dilution and liquid–gas partition coefficient provide information about the quantitative and qualitative energy of intermolecular interactions, whereas γ i ∞ allows for the selection of the best solvent for use in a separation process as well as the determination of parameters in thermodynamic models used in vapor–liquid equilibrium modeling. , …”

“…Researchers have shown that SPME can be successfully used for the determination of partition coefficients , and activity coefficients. ,, The technique has advantages such as excellent reproducibility, easy implementation, and low cost, making it an excellent methodology for the determination of vapor–liquid equilibrium data …”

“…Both the activity coefficient at infinite dilution and liquid−gas partition coefficient provide information about the quantitative and qualitative energy of intermolecular interactions, 2 whereas γ i ∞ allows for the selection of the best solvent for use in a separation process as well as the determination of parameters in thermodynamic models used in vapor−liquid equilibrium modeling. 3,4 The main techniques used for the determination of the activity coefficient at infinite dilution with ionic fluids are gas− liquid chromatography (GLC) and gas stripping method (dilutor technique). 5 The Headspace-Solid Phase Micro Extraction is a novel methodology used to determine γ i ∞ .…”

“…6 Researchers have shown that SPME can be successfully used for the determination of partition coefficients 7,8 and activity coefficients. 3,4,6 The technique has advantages such as excellent reproducibility, easy implementation, and low cost, making it an excellent methodology for the determination of vapor−liquid equilibrium data. 3 The main purpose of this study was to determine the activity coefficients in infinite dilution γ i ∞ of six alcohols (methanol, ethanol, 1-propanol, 1-butanol, 2-butanol, and 2-methyl-2propanol) in ionic liquid ([TBMA][CH 3 SO 4 ]).…”

Determinação Dos Coeficientes De Atividade Na Diluição Infinita De Compostos Orgânicos Em [Bmim] [Meso4] Por Hs-Spme/Gc-Fid Nas Temperaturas De 298,15, 313,15, 333,15 E 353,15 K

“…A modelagem de processos industriais requer um detalhado estudo das condições de equilíbrio do sistema, para que seja possível a determinação de importantes parâmetros termodinâmicos, como o coeficiente de atividade em diluição infinita γ i ∞ (Elias et al, 2014).…”