Modeling the kinetics of essential oil hydrodistillation from plant materials
The present work deals with modeling 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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Association of Chemical Engineers of Serbia
2013-01-01
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| Series: | Hemijska Industrija |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0367-598X/2013/0367-598X1300009M.pdf |
| Summary: | The present work deals with modeling 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. the 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 one is the model 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. |
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| ISSN: | 0367-598X 2217-7426 |