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

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Volume Title

Kemian tekniikan korkeakoulu |

Authors

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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Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-201408272514

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