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Mathematical modelling of subcritical water extraction of essential oil from Aquilaria Malacenssis wood

Subcritical water extraction (SWE) is gaining popularity due to its ability to manipulate water properties at high pressure and temperature. Here, the essential oil from Aquilaria Malacenssis wood was recovered using the subcritical technique. The aim is to elucidate SWE mechanism or behaviour and m...

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Main Authors: Zainal Abidin, Zurina, Samadi, Mahtab, Awang Biak, Dayang Radiah, Yunus, Robiah
Format: Article
Published: Tamkang University Press 2023
Online Access:http://psasir.upm.edu.my/id/eprint/110343/
http://jase.tku.edu.tw/articles/jase-202412-27-12-0012
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spelling my.upm.eprints.1103432024-09-11T02:41:02Z http://psasir.upm.edu.my/id/eprint/110343/ Mathematical modelling of subcritical water extraction of essential oil from Aquilaria Malacenssis wood Zainal Abidin, Zurina Samadi, Mahtab Awang Biak, Dayang Radiah Yunus, Robiah Subcritical water extraction (SWE) is gaining popularity due to its ability to manipulate water properties at high pressure and temperature. Here, the essential oil from Aquilaria Malacenssis wood was recovered using the subcritical technique. The aim is to elucidate SWE mechanism or behaviour and mathematically define the process kinetics for future scaling up, designing unit operation and improving efficiency. The extraction processes were carried out at various subcritical conditions such as varying temperature and time. These concentration-time profile data were analyzed using four models namely partitioning coefficient, one-site desorption, two-site desorption and thermodynamic partition with external mass transfer. Concentration (yield)-time profile indicated that the subcritical water extraction occurred in two simultaneous processes of fast and slow desorption. The fast process persisted during the initial 10 minutes with large changes in the essential oil yield. From this onwards until the end of extraction time, a gradual slow increment was seen till a plateau was reached. Three models which are second order, two-site kinetic and partitioning coefficient with external mass transfer were found to give reasonable SSR and R2 23 values. However, the two-site kinetic/second order model emerged to best fit the experimental data with low SSR of less than 0.002 and high R2 25 of greater than 0.99. Using the two rate constants of k1 and k2 from the two-site kinetic model, activation energies were calculated and found to be 16.5 KJ/mol and 28 KJ/mol for fast desorption and slow diffusion respectively. In short, SWE has demonstrated good enhancement of the extraction yield and temperature being the critical parameter. These findings on kinetics and modelling can facilitate the reduction of energy and time for scaling up and optimization. Tamkang University Press 2023 Article PeerReviewed Zainal Abidin, Zurina and Samadi, Mahtab and Awang Biak, Dayang Radiah and Yunus, Robiah (2023) Mathematical modelling of subcritical water extraction of essential oil from Aquilaria Malacenssis wood. Journal of Applied Science and Engineering, 27 (12). pp. 1-31. ISSN 2708-9967; ESSN: 2708-9975 http://jase.tku.edu.tw/articles/jase-202412-27-12-0012
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
description Subcritical water extraction (SWE) is gaining popularity due to its ability to manipulate water properties at high pressure and temperature. Here, the essential oil from Aquilaria Malacenssis wood was recovered using the subcritical technique. The aim is to elucidate SWE mechanism or behaviour and mathematically define the process kinetics for future scaling up, designing unit operation and improving efficiency. The extraction processes were carried out at various subcritical conditions such as varying temperature and time. These concentration-time profile data were analyzed using four models namely partitioning coefficient, one-site desorption, two-site desorption and thermodynamic partition with external mass transfer. Concentration (yield)-time profile indicated that the subcritical water extraction occurred in two simultaneous processes of fast and slow desorption. The fast process persisted during the initial 10 minutes with large changes in the essential oil yield. From this onwards until the end of extraction time, a gradual slow increment was seen till a plateau was reached. Three models which are second order, two-site kinetic and partitioning coefficient with external mass transfer were found to give reasonable SSR and R2 23 values. However, the two-site kinetic/second order model emerged to best fit the experimental data with low SSR of less than 0.002 and high R2 25 of greater than 0.99. Using the two rate constants of k1 and k2 from the two-site kinetic model, activation energies were calculated and found to be 16.5 KJ/mol and 28 KJ/mol for fast desorption and slow diffusion respectively. In short, SWE has demonstrated good enhancement of the extraction yield and temperature being the critical parameter. These findings on kinetics and modelling can facilitate the reduction of energy and time for scaling up and optimization.
format Article
author Zainal Abidin, Zurina
Samadi, Mahtab
Awang Biak, Dayang Radiah
Yunus, Robiah
spellingShingle Zainal Abidin, Zurina
Samadi, Mahtab
Awang Biak, Dayang Radiah
Yunus, Robiah
Mathematical modelling of subcritical water extraction of essential oil from Aquilaria Malacenssis wood
author_facet Zainal Abidin, Zurina
Samadi, Mahtab
Awang Biak, Dayang Radiah
Yunus, Robiah
author_sort Zainal Abidin, Zurina
title Mathematical modelling of subcritical water extraction of essential oil from Aquilaria Malacenssis wood
title_short Mathematical modelling of subcritical water extraction of essential oil from Aquilaria Malacenssis wood
title_full Mathematical modelling of subcritical water extraction of essential oil from Aquilaria Malacenssis wood
title_fullStr Mathematical modelling of subcritical water extraction of essential oil from Aquilaria Malacenssis wood
title_full_unstemmed Mathematical modelling of subcritical water extraction of essential oil from Aquilaria Malacenssis wood
title_sort mathematical modelling of subcritical water extraction of essential oil from aquilaria malacenssis wood
publisher Tamkang University Press
publishDate 2023
url http://psasir.upm.edu.my/id/eprint/110343/
http://jase.tku.edu.tw/articles/jase-202412-27-12-0012
_version_ 1811686065066475520
score 13.211869

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