Document Type
Article
Publication Date
3-25-2015
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.
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
Divisions
fac_eng
Publication Title
Separation and Purification Technology
Volume
143
Publisher
Separation and Purification Technology
Additional Information
Ce6rv Times Cited:0 Cited References Count:19