Modeling the kinetics of essential oil hydrodistillation from plant materials

Abstract

The present work deals with the modeling of the kinetics of essential oils extraction from plant materials by water and steam distillation. The experimental data were obtained by studying the hydrodistillation kinetics of essential oil from juniper berries. The literature data on the kinetics of essential oils hydrodistillation from different plant materials were also included into the modeling. A physical model based on simultaneous washing and diffusion of essential oil from plant materials were developed to describe the kinetics of essential oils hydrodistillation, and two other simpler models were derived from this physical model assuming either instantaneous washing followed by diffusion or diffusion with no washing (i.e., first-order kinetics). The main goal was to compare these models and suggest the optimum ones for water and steam distillation and for different plant materials. All three models described well the experimental kinetic data on water distillation irrespective of the type of distillation equipment and its scale, the type of plant materials and the operational conditions. The most applicable model is the one involving simultaneous washing and diffusion of the essential oil. However, this model was generally inapplicable for steam distillation of essential oils, except for juniper berries. For this hydrodistillation technique, the pseudo first-order model was shown to be the best one. In a few cases, a variation of the essential oil yield with time was observed to be sigmoidal and was modeled by the Boltzmann sigmoid function.

Novel configurations for a citrus waste based biorefinery: from solventless to simultaneous ultrasound and microwave assisted extraction

“…During the t ind , the EO volatile compounds begin to be released into the extraction media from exogenous secreting glands, according to the washing and diffusion model (Milojevic et al, 2013) but without actually separating. Since the temperature is continuously increased, an increase in pressure then follows within the exogenous glands (due to the expansion of the volatile compounds), leading to the cellular wall breakage and the release of the essential oil.…”

Fast and Eco–friendly Microwave‐Assisted Synthesis of Silver Nanoparticles using Rosemary Essential Oil as Renewable Reducing Agent.

“…The oxygenated compounds, such as 1,8‐cineole and camphor, which have a highly complex permittivity, can be extracted more easily due to their strong MW interaction. On the other hand, the hydrocarbon monoterpenes, such as α‐pinene and limonene, show less of an MW interaction, leading to a different release of the volatile compounds from exogenous secreting glands (washing and diffusion effects) . This possible mechanism is favoured since a high substrate/water ratio (1:5) was performed for both extraction approaches (MWHD and HD).…”

Kinetic Modeling of Hydrodistillation of Essential Oil Production from Orange (Citrus sinensis) Peels on Pilot Scale

“…Kinetic models play an important function for hydrodistillation processes under both technological and economic perspectives. Another study demonstrated the relationship between drying of the material to the performance and composition of essential oil [27][28][29][30][31].…”