Vapor-Liquid Equilibrium of Ethanol + Sulfur Dioxide and Ethanol + Water + Sulfur Dioxide at Six Temperatures

Juha-Pekka Pokki*, Petri Uusi-Kyyny, Ville Alopaeus

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Binary isothermal vapor-liquid equilibrium (VLE) of ethanol and sulfur dioxide (SO2) at six temperatures (303-353 K) was measured. The systems were modeled using the non-random two-liquid (NRTL)-Hayden-O’Connell (HOC) model. The NRTL parameters were optimized using Barker’s data reduction method. Ternary isothermal VLE of ethanol, water, and SO2 at six temperatures (303-353 K) was measured. The binary isothermal VLE of SO2 and water in the dilute range of SO2 and liquid-liquid equilibrium (LLE) were found in the literature, and the NRTL parameters were optimized for the system. In addition, the isothermal VLE for ethanol and water found in the literature was used to evaluate the default parameters of Aspen Plus and found accurate. The binary LLE of water and SO2 was essential in modeling the phenomenologically proper phase behavior. With the optimized parameters, it was possible to calculate the LLE and vapor-liquid-liquid equilibrium (VLLE) regions of the ternary system. The comparison of the model and measurements to the literature were presented, and very good accuracy was found.

Original languageEnglish
Pages (from-to)3506–3520
JournalJournal of Chemical and Engineering Data
Volume69
Issue number10
Early online date29 Apr 2024
DOIs
Publication statusPublished - 10 Oct 2024
MoE publication typeA1 Journal article-refereed

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