Liquid–Liquid Equilibrium Investigations and Thermodynamic Modeling of Ternary Mixtures (Propylene Carbonate + Toluene or Phenol + n-Hexane or n-Octane) at 293.2 K
Sina Shekarsaraee*, Zeynab Mohammadi and Niyayesh Narimani Sabegh,
{"title":"Liquid–Liquid Equilibrium Investigations and Thermodynamic Modeling of Ternary Mixtures (Propylene Carbonate + Toluene or Phenol + n-Hexane or n-Octane) at 293.2 K","authors":"Sina Shekarsaraee*, Zeynab Mohammadi and Niyayesh Narimani Sabegh, ","doi":"10.1021/acs.jced.5c00535","DOIUrl":null,"url":null,"abstract":"<p >The liquid–liquid equilibria (LLE) of four ternary systems (propylene carbonate (PC) + toluene or phenol + <i>n</i>-hexane or <i>n</i>-octane) were studied at 293.2 K and 101.3 kPa. The study aimed to assess the effectiveness of PC in extracting nonpolar and polar aromatic compounds from alkanes with molar weights similar to gasoline components. Tie-line data and mutual solubilities were determined using refractive index measurements, while cloud point titration was employed to define binary phase regions. Systems with toluene exhibited Type I LLE behavior, while those with phenol showed Type II behavior. Experimental tie-lines were correlated with NRTL and UNIQUAC models, yielding rmsd values below 1%, indicating excellent model accuracy. NRTL binary interaction parameters were validated via MATLAB GUI tools, and activity coefficients were calculated. Toluene exhibited negative deviations from Raoult’s law in both phases, whereas phenol showed negative deviations at low phenol concentrations, with positive deviations observed in the alkane phase. Distribution coefficients and selectivities confirmed the strong extraction ability of PC, particularly for phenol, which exhibited values significantly higher than those of toluene, highlighting the greater separation efficiency for polar aromatic compounds.</p>","PeriodicalId":42,"journal":{"name":"Journal of Chemical & Engineering Data","volume":"70 9","pages":"3825–3836"},"PeriodicalIF":2.1000,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Chemical & Engineering Data","FirstCategoryId":"1","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.jced.5c00535","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The liquid–liquid equilibria (LLE) of four ternary systems (propylene carbonate (PC) + toluene or phenol + n-hexane or n-octane) were studied at 293.2 K and 101.3 kPa. The study aimed to assess the effectiveness of PC in extracting nonpolar and polar aromatic compounds from alkanes with molar weights similar to gasoline components. Tie-line data and mutual solubilities were determined using refractive index measurements, while cloud point titration was employed to define binary phase regions. Systems with toluene exhibited Type I LLE behavior, while those with phenol showed Type II behavior. Experimental tie-lines were correlated with NRTL and UNIQUAC models, yielding rmsd values below 1%, indicating excellent model accuracy. NRTL binary interaction parameters were validated via MATLAB GUI tools, and activity coefficients were calculated. Toluene exhibited negative deviations from Raoult’s law in both phases, whereas phenol showed negative deviations at low phenol concentrations, with positive deviations observed in the alkane phase. Distribution coefficients and selectivities confirmed the strong extraction ability of PC, particularly for phenol, which exhibited values significantly higher than those of toluene, highlighting the greater separation efficiency for polar aromatic compounds.
期刊介绍:
The Journal of Chemical & Engineering Data is a monthly journal devoted to the publication of data obtained from both experiment and computation, which are viewed as complementary. It is the only American Chemical Society journal primarily concerned with articles containing data on the phase behavior and the physical, thermodynamic, and transport properties of well-defined materials, including complex mixtures of known compositions. While environmental and biological samples are of interest, their compositions must be known and reproducible. As a result, adsorption on natural product materials does not generally fit within the scope of Journal of Chemical & Engineering Data.