Investigation of the Low-Pressure Phase Behavior and SAFT Modeling of 1-Alcohol and n-Alkane Binary Systems

Susanna H. du Plessis, Sonja A.M. Smith, Carla Latsky-Galloway, Cara E. Schwarz*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The low-pressure phase behavior of 1-alcohol + n-alkane systems is investigated by considering trends in the experimental data and the ability of SAFT models to predict the data. Data for four new isobaric binary 1-alcohol + n-alkane systems at 40 kPa are presented in this study, including 1-heptanol + n-octane, 1-octanol + n-nonane, 1-nonanol + n-decane, and 1-decanol + n-undecane. These systems were not azeotropic, although positive deviations from ideality were observed. The CnOH + Cn+1 data were compared to the previously measured data for the CnOH + Cn+2, CnOH + Cn+3, and CnOH + Cn+4 systems, and trends and observations were elucidated. It was concluded that the azeotropic composition could be predicted for other systems not considered in these studies based on the available data. Finally, the modeling of the available n-alkane and 1-alcohol data was considered using the PC-SAFT and SAFT-VR-Mie models, and SAFT-VR-Mie consistently outperformed PC-SAFT.
Original languageEnglish
JournalJournal of Chemical and Engineering Data
Volume69
Pages (from-to)623-638
ISSN0021-9568
DOIs
Publication statusPublished - 2024

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Publisher Copyright:
© 2023 The Authors. Published by American Chemical Society.

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