Ternary liquid-liquid equilibrium measurements of systems consisting of water, furfural and solvent

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Journal Title
Journal ISSN
Volume Title
Kemian tekniikan korkeakoulu |
Date
2014-06-23
Department
Major/Subject
Chemical Technology
Mcode
KE3004
Degree programme
MTE - Materiaalitekniikan koulutusohjelma
Language
en
Pages
69
Series
Abstract
This thesis presents experimental liquid-liquid equilibrium of ternary systems of furfural, water and solvent. This study belongs to a large project on computational aspects of phase equilibrium and experimental phase equilibrium measurements on biorefinery concepts funded by Academy of Finland (decision ID 253336). Liquid-liquid equilibrium (LLE) and selection of solvent are important in modelling extraction process because the components typically are highly diluted in water. Within the scope of the project the review on existing measurements on liquid-liquid equilibria revealed that only 4-Methyl-2-pentanone (methyl isobutyl ketone) and 2-methyl-2-butanol (tert-pentanol) had some ternary LLE at room temperature with furfural and water. 2-Butanol had no ternary LLE with furfural and water. The experiments carried out with a system of thermostated cells equipped with mixer. The systems under investigation were MIBK + furfural + water, tert-pentanol + furfural + water and 2-butanol + furfural + water from room temperature up to 70 C.Acetone was used as an internal standard technique and samples were analysed by using a gas chromatograph (GC) equipped with non-polar GC column to the flame ionisation detector (FID) and polar GC column to the thermal conductivity detector (TCD) in parallel. For every system the samples were taken with the help of a syringe. Binary samples were repeated several times at several temperatures. The ternary systems were measured at three isotherms. The MIBK + furfural + water system was the reference system and the trend of the points was very close to the literature data. For the system tert – pentanol + furfural + water it was observed the same result. For the system 2-butanol + furfural + water there were no literature data. This system was the most challenging to measure because of a long settling time. In addition the system exhibits two liquid-liquid regions which means that it is not suitable as a solvent for extraction purpose.
Description
Supervisor
Alopaeus, Ville
Thesis advisor
Pokki, Juha-Pekka
Keywords
liquid-liquid equilibrium, furfural water solvent, ternary system, binary system.
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