Isobaric Vapor–Liquid Equilibrium of Furfural + γ-Valerolactone at 30 kPa and Isothermal Liquid–Liquid Equilibrium of Carbon Dioxide + γ-Valerolactone + Water at 298 K

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Abstract

The phase equilibria of four subsystems related to the γ-valerolactone (GVL) based biorefinery concept were measured. The liquid–liquid equilibrium (LLE) is important in separating GVL from aqueous solution with the aid of carbon dioxide. LLE of dense carbon dioxide, GVL, and water at 7.5 MPa was measured in a high pressure equilibrium cell equipped with a pneumatic capillary sampler. The solubility of GLV was from 2 to 10 times higher in the dense CO2 phase than in the aqueous phase indicating CO2 is a good solvent for this separation. The vapor–liquid equilibrium of furfural and GVL is important in the separation of traces of furfural from GVL in solvent recycling. It was found that furfural and GVL is a very ideal binary system at subatmospheric pressure. The predictive SRK (PSRK) equation of state and UNIQUAC activity coefficient model were used to model the binary and ternary systems measured in this work.
Original languageEnglish
Pages (from-to)4381–4391
Number of pages10
JournalJournal of Chemical Engineering Data
Volume63
Issue number12
DOIs
Publication statusPublished - 14 Nov 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • carbon dioxide
  • Furfural
  • water
  • Gamma-valerolactone
  • vapor liquid equilibrium
  • liquid liquid equilibrium
  • Biorefinery
  • separation
  • solvent recycling

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  • Projects

    CERES: Competence Center for the materials Bioeconomy: A Flagship for our Sustainable Future

    Mäkelä, K.

    01/05/201831/12/2022

    Project: Academy of Finland: Other research funding

    Equipment

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