Vapor-liquid equilibrium in the ternary systems acetic acid + water + (xylose or glucose)

Nadia Galeotti, Jakob Burger, Hans Hasse

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Hydrolysates of lignocellulosic biomass are aqueous solutions containing, among others, sugars and acetic acid. They are concentrated by evaporation. Only little is known on the influence of the sugars on the volatility of the low-molecular-weight components in those mixtures. Therefore, in the present work the isobaric vapor-liquid equilibrium of the systems (acetic acid (AA) + water (W) + xylose (X)) and (acetic acid (AA) + water (W) + glucose (G)) was studied at 20.0 kPa in a thin film evaporator. The results show that the volatility of acetic acid is increased by the sugars and that xylose and glucose have a similar influence. The vapor-liquid equilibrium data were correlated using the NRTL model for describing the liquid phase non-ideality and taking the dimerization of acetic acid in the vapor phase into account.

Original languageEnglish
Pages (from-to)323-329
Number of pages7
JournalFluid Phase Equilibria
Volume473
DOIs
StatePublished - 15 Oct 2018

Keywords

  • Acetic acid
  • Glucose
  • NRTL
  • Vapor-liquid equilibrium
  • Xylose

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