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, Ahmed Zermane, Abdeslam-Hassen Meniai, Souad Boubaira, Hayat Kouis, Hafida Boubadjaa
Copyright: © 2020 |Pages: 11
DOI: 10.4018/IJEOE.2020070104
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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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