A generalized energy-based kinetic model for microwave-assisted extraction of bioactive compounds from plants

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

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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
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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