Optimization of Hydrodistillation of Rosemary Essential Oil: Comparison With Supercritical CO2 Extraction

Optimization of Hydrodistillation of Rosemary Essential Oil: Comparison With Supercritical CO2 Extraction

Ouassila Larkeche (University Constantine 3, Algeria), Ahmed Zermane (Universiy Larbi Ben Mhidi Oum El Bouaghi, Algeria), Abdeslam-Hassen Meniai (Laboratoire ingénierie des procédés de l'environement, University Constantine 3, Algeria), Souad Boubaira (University Constantine 3, Algeria), Hayat Kouis (University Constantine 3, Algeria) and Hafida Boubadjaa (University Constantine 3, Algeria)
Copyright: © 2020 |Pages: 11
DOI: 10.4018/IJEOE.2020070104

Abstract

Extraction of essential oil from Algerian rosemary leaves is carried out by means of a hydro-distillation process. The important operating parameters such as extraction time, condensation flow rate and water/solid plant material ratio, have been investigated. The highest yield value was 1.92% and was obtained for a water/plant ratio, a condensate flowrate, and extraction time of 20, 4.51ml/min and 120 min, respectively. The essential oil components have been identified using the GCMS analysis which show camphor as the major ingredient, followed by camphene, α-pinene and 1,8-cineole. The results have been compared with those obtained using a supercritical carbon dioxide extraction process, which has shown to be more much better quantitatively and qualitatively.
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2. Materials And Methods

2.1 Vegetable Material

Rosemary leaves were collected locally (North east of Algeria), in March 2015. After drying they were ground in a small coffee grinder to obtain a powder with a required average particle size of 0.315mm, by means of sieving by a Retsch type vibrating system.

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