A Generalized Energy-Based Kinetic Model for Microwave-Assisted Extraction of Bioactive Compounds from Plants

Separation and Purification Technology, Vol. 143, p. 152-160, 2015

22 Pages Posted: 14 Mar 2017

See all articles by Chung-Hung Chan

Chung-Hung Chan

affiliation not provided to SSRN

Jian-Jiun Lim Lim

University of Malaya (UM) - Department of Chemical Engineering

Rozita Yusoff

University of Malaya (UM) - Department of Chemistry

Gek-Cheng Ngoh

University of Malaya (UM) - Department of Chemistry

Date Written: February 22, 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 (100-300 W) and extraction temperature (50 °C and 70 °C). The results shows that the model (b = 0.5595 and k ’ = 0.01279 ml/J) is able to predict the normalised 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 (85% ethanol) and solvent to feed ratio (50 ml/g).

Keywords: Absorbed Power Density (APD), Absorbed Energy Density (AED), Generalized Model, Heating Modes, Normalized Extraction Yield

JEL Classification: C61, A00, B00, C90, I20, Q20, Q00, Q16, Q32

Suggested Citation

Chan, Chung-Hung and Lim, Jian-Jiun Lim and Yusoff, Rozita and Ngoh, Gek-Cheng, A Generalized Energy-Based Kinetic Model for Microwave-Assisted Extraction of Bioactive Compounds from Plants (February 22, 2015). Separation and Purification Technology, Vol. 143, p. 152-160, 2015. Available at SSRN: https://ssrn.com/abstract=2921705

Chung-Hung Chan (Contact Author)

affiliation not provided to SSRN

Jian-Jiun Lim Lim

University of Malaya (UM) - Department of Chemical Engineering ( email )

Centre for Separation Science and Technology,
Faculty of Engineering
Kuala Lumpur, 50603
Malaysia

Rozita Yusoff

University of Malaya (UM) - Department of Chemistry

Jalan Lembah Pantai
Kuala Lumpur, Wilayah Persekutuan 50603
Malaysia

Gek-Cheng Ngoh

University of Malaya (UM) - Department of Chemistry

Jalan Lembah Pantai
Kuala Lumpur, Wilayah Persekutuan 50603
Malaysia

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