Chan, C.H. and Lim, J.J. and Yusoff, R. and Ngoh, G.C. (2015) A generalized energy-based kinetic model for microwave-assisted extraction of bioactive compounds from plants. Separation and Purification Technology, 143. pp. 152-160. ISSN 1383-5866, DOI https://doi.org/10.1016/j.seppur.2015.01.041.
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Abstract
By considering the absorbed power and energy based on heating power profile during extraction, a generalized model with washing coefficient (b), diffusion coefficient (k) and predictive parameter namely absorbed power density (APD) was developed for microwave-assisted extraction (MAE) at any operational heating modes. To study the model, MAE of flavonoids from cocoa (Theobroma cacao L.) leaves was conducted using the heating modes (constant-power, two-steps-power, intermittent-power and constant-temperature) at various microwave power (100-300W) and extraction temperature (50 degrees C and 70 degrees C). The results shows that the model (b = 0.5595 and k' = 0.01279 mL/J) is able to predict the normalized extraction yields of MAE at any heating modes, heating power, microwave system, extraction scale and batch of plant sample with less than 4 discrepancy. The accuracy of the prediction relies on particle size of sample (0.25-0.60 mm), type of extraction solvent (85 aqueous ethanol) and solvent to feed ratio (50 mL/g). (C) 2015 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Additional Information: | Ce6rv Times Cited:0 Cited References Count:19 |
| Uncontrolled Keywords: | Absorbed power density (apd), absorbed energy density (aed), generalized model, heating modes, normalized extraction yield, carrot peels, natural dye, optimization, wastes, seeds, hplc, oil, |
| Subjects: | T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology |
| Divisions: | Faculty of Engineering |
| Depositing User: | Mr Jenal S |
| Date Deposited: | 23 Jul 2015 00:29 |
| Last Modified: | 23 Jul 2015 00:29 |
| URI: | http://eprints.um.edu.my/id/eprint/13752 |
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