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Phase Behavior and Thermodynamic Modelling for Biofuel Relevant Oxygenated Mixtures: 3-Pentanol + Propionic acid and 3-Pentanol + 2-Propanol at 101.3 kPa.

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Title: Phase Behavior and Thermodynamic Modelling for Biofuel Relevant Oxygenated Mixtures: 3-Pentanol + Propionic acid and 3-Pentanol + 2-Propanol at 101.3 kPa.
Authors: Altway, Saidah1 (AUTHOR) saidahaltway@chem-eng.its.ac.id, Wibowo, Agung Ari2 (AUTHOR) agung.ari@polinema.ac.id, Bekti, Andi Setyo1 (AUTHOR), Altway, Ali3 (AUTHOR), Qomariyah, Lailatul1 (AUTHOR), Zuchrillah, Daril Ridho1 (AUTHOR)
Source: Journal of Solution Chemistry. May2026, Vol. 55 Issue 5, p811-824. 14p.
Subjects: Pentanol, Propionic acid, Isopropyl alcohol, Biomass energy, Vapor-liquid equilibrium, Mixtures, Phase equilibrium
Abstract: In this study, the VLE of the binary systems containing 3-pentanol + propionic acid and 2-propanol + 3-pentanol were measured at 101.3 kPa using an Othmer-type ebulliometer. The measured temperatures of the binary mixture ranged from 388.59 K to 414.25 K and 355.19 K to 388.49 K for the 3-pentanol + propionic acid and 2-propanol + 3-pentanol systems, respectively. The results showed that the relative volatilities (α12) were greater than 1, and no azeotrope was found in the binary systems studied. The Non-Random Two-Liquid (NRTL) and Universal Quasi-Chemical (UNIQUAC) models, in combination with the Hayden O'Connell (HOC) model, accurately correlated the experimental VLE data for 3-pentanol + propionic acid. The experimental VLE of the 2-propanol + 3-pentanol system was well correlated by the NRTL and UNIQUAC models. The average absolute percentage deviations (AAPDs) of temperatures and equilibrium compositions were less than 1% for all systems and models used. The consistency of the experimental VLE data was satisfactorily ascertained using the Herington test method. The Universal Functional Activity Coefficient (UNIFAC) and UNIFAC-HOC models were also applied in this study and compared with the experimental VLE data. [ABSTRACT FROM AUTHOR]
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Abstract:In this study, the VLE of the binary systems containing 3-pentanol + propionic acid and 2-propanol + 3-pentanol were measured at 101.3 kPa using an Othmer-type ebulliometer. The measured temperatures of the binary mixture ranged from 388.59 K to 414.25 K and 355.19 K to 388.49 K for the 3-pentanol + propionic acid and 2-propanol + 3-pentanol systems, respectively. The results showed that the relative volatilities (α12) were greater than 1, and no azeotrope was found in the binary systems studied. The Non-Random Two-Liquid (NRTL) and Universal Quasi-Chemical (UNIQUAC) models, in combination with the Hayden O'Connell (HOC) model, accurately correlated the experimental VLE data for 3-pentanol + propionic acid. The experimental VLE of the 2-propanol + 3-pentanol system was well correlated by the NRTL and UNIQUAC models. The average absolute percentage deviations (AAPDs) of temperatures and equilibrium compositions were less than 1% for all systems and models used. The consistency of the experimental VLE data was satisfactorily ascertained using the Herington test method. The Universal Functional Activity Coefficient (UNIFAC) and UNIFAC-HOC models were also applied in this study and compared with the experimental VLE data. [ABSTRACT FROM AUTHOR]
ISSN:00959782
DOI:10.1007/s10953-025-01547-z