Skip to Main content Skip to Navigation
Theses

Stabilisation de l'interface liquide-liquide dans un contacteur membranaire : Application à l'extraction sélective de terpènes oxygénés d'huile essentielle d'agrumes

Abstract : Citrus essential oils are an abundant and inexpensive source of oxygenated terpenes, which are highly valuable molecules in particular for the flavor and fragrance industry. Their industrial liquid-liquid extraction can potentially be intensified by the use of membrane contactors which eliminate the need for a decantation step and afford a broader choice of solvents. However, the low interfacial tension between the citrus oils and the hydro-alcoholic solvents typically used for extraction makes interface stabilization very challenging. In fact, it requires such a tight process control that the use of membrane contactors is currently not feasible on industrial scale. The aim of this work was therefore to propose solutions to facilitate the interface stabilization in membrane contactors. Practically, this consists in the broadening of the pressure difference range between the two phases must be controlled. A pressure difference of 0.5 bar was selected as a minimum to apply this technology at industrial scale. This means that the breakthrough pressure ΔPc, i.e. the pressure difference above which the non wetting phase passes through the membrane, has to be above 0.5 bar. Two approaches were investigated: firstly, to select the best suited solvent, and secondly to identify membranes with small maximum diameter of pores and appropriate surface properties. In conclusion, this study afforded the identification of membranes in PTFE and grafted ceramic for which the pressure difference between the two phases can be controlled in a relatively broad window of 0.5 bar. It represents a significant advance compared to commercially available Liqui-Cel® modules in polypropylene.
Complete list of metadatas

Cited literature [187 references]  Display  Hide  Download

https://pastel.archives-ouvertes.fr/pastel-00626547
Contributor : Jonga Dequeant <>
Submitted on : Monday, September 26, 2011 - 2:44:20 PM
Last modification on : Saturday, June 6, 2020 - 7:10:23 AM
Long-term archiving on: : Sunday, December 4, 2016 - 11:39:12 AM

Identifiers

  • HAL Id : pastel-00626547, version 1
  • PRODINRA : 246083

Collections

Citation

Aurélie Dupuy. Stabilisation de l'interface liquide-liquide dans un contacteur membranaire : Application à l'extraction sélective de terpènes oxygénés d'huile essentielle d'agrumes. Génie des procédés. AgroParisTech, 2010. Français. ⟨NNT : 2010AGPT0031⟩. ⟨pastel-00626547⟩

Share

Metrics

Record views

1108

Files downloads

6021