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Dynamic performance of optimized microwave assisted extraction to obtain Eucalyptus essential oil: energy requirements and environmental impact

  • Elizabeth Lainez-Cerón , Aurelio López-Malo , Enrique Palou and Nelly Ramírez-Corona ORCID logo EMAIL logo
Published/Copyright: January 7, 2022

Abstract

The dynamic performance of a microwave-assisted extraction (MAE) was studied during the extraction of eucalyptus essential oil. The effect of different process variables such as solid/liquid ratio (1:1, 1:3, or 1:5), stirring speed (0, 200, or 400 rpm), and power microwave output (360, 450, or 540 W) on obtained yield, energy requirements and environmental impact were assessed. The maximum yield was 1.26 ± 0.01% and the steam generation velocities between 4.8 and 8.8 g/min favor the extraction. In terms of environmental impact, the lowest EI99 value obtained was 6.93 ± 0.1 mPT/g. A multi-response optimization was performed to identify the operating conditions that maximize yield, while minimize energy requirements and environmental impact. Temperature dynamics and extraction kinetics were fitted to a second-order transfer function model, aimed to evaluate the role of heating patterns on the process performance. Finally, a controlled temperature experiment was carried out under the optimal conditions.


Corresponding author: Nelly Ramírez-Corona, Departamento de Ingeniería Química, Alimentos y Ambiental, Universidad de las Américas Puebla, San Andrés Cholula, Puebla 72810. México, E-mail:

Funding source: Consejo Nacional de Ciencia y Tecnología http://dx.doi.org/10.13039/501100003141

Award Identifier / Grant number: CB-2016-01-283636

Funding source: Universidad de las Americas Puebla (UDLAP)

Acknowledgements

Author Lainez-Cerón acknowledges financial support for her PhD studies from CONACyT and UDLAP.

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: The National Council for Science and Technology (CONACyT) of Mexico [grant CB-2016-01-283636] and Universidad de las Americas Puebla (UDLAP) supported this work.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2021-04-06
Accepted: 2021-12-22
Published Online: 2022-01-07

© 2021 Walter de Gruyter GmbH, Berlin/Boston

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