Kinetic Modelling of Supercritical CO₂ Extraction from Swietenia macrophylla Seeds Extracts Using the Single Sphere Model
Mohammad Lokman HILMI, Liza Md SALLEH, Hasmida Mohd NASIR, Noor Azwani Mohd RASIDEK
Abstract. Swietenia macrophylla, commonly known as “Tunjuk Langit,” has been reported to exhibit antidiabetic properties, attributed to its high phytosterol content, with β-sitosterol comprising approximately 66% of the total sterols in the extract. In this study, supercritical carbon dioxide (SC-CO₂) was used to extract oil from S.macrophylla, and the mass transfer behaviour was modelled using the single sphere model (SSM). Key parameters namely the diffusion coefficient (Dₑ) and external mass transfer coefficient (kf) were estimated based on experimental data. The Dₑ values ranged from 1.0104 × 10⁻¹³ to 17.912 × 10⁻¹3 m²/s, while kf varied between 0.7115 × 10⁻6 and 3.9919 × 10⁻⁶ m/s. Biot numbers consistently exceeded 500 across all parameters, confirming that internal diffusion governs the SC-CO₂ extraction process of S.macrophylla. The results highlight the importance of considering both internal diffusion and external film resistance when modelling extraction kinetics to achieve accurate process predictions.
Keywords
Supercritical Carbon Dioxide Extraction, Swietenia Macrophylla, Single Sphere Model, Diffusion, Mass Transfer
Published online 1/15/2026, 7 pages
Copyright © 2026 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Mohammad Lokman HILMI, Liza Md SALLEH, Hasmida Mohd NASIR, Noor Azwani Mohd RASIDEK, Kinetic Modelling of Supercritical CO₂ Extraction from Swietenia macrophylla Seeds Extracts Using the Single Sphere Model, Materials Research Proceedings, Vol. 59, pp 80-86, 2026
DOI: https://doi.org/10.21741/9781644903957-11
The article was published as article 11 of the book Separation Technology
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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