Optimization and Mathematical Modelling of Gallic Acid Extraction and Determination of Diffusion Coefficients

Year 2019, , 69 - 75, 15.12.2019

Emirhan Hesap , Diclecan Bulut , Sibel Yiğitarslan

https://doi.org/10.33435/tcandtc.469486

Abstract

Polyphenols, which have attracted attention with their anti-carcinogenic
properties in recent years, are used in many fields and are found in many
fruits, vegetables and cereals. It has also started to be used industrially in
food and pharmaceutical industries. The researches conducting on the kinetics,
diffusion constants and their relations with temperature, which make the
process industrially more efficient, were scarcely available. In this study,
total polyphenol extraction from Cinnamonumzeylaniccum with the help of
methanol solvent was investigated within this concept. Different parameters
were examined including temperature (25-60°C), time of extraction (10-90
minutes), mixing rate (0-250 rpm), and solid-to-liquid ratio (0.3-1.5 g/40 mL)
in the single-optimization method. Multiple optimization parameters were
examined and three-dimensional respose surfaces were plotted by Design Expert
program according to the optimum results of the single optimization. In the
light of this data, it was concluded that the most effective single parameter
was the temperature, and the most effective binary parameters were the
time-temperature. Diffusion kinetics data were obtained by performing
experiments at different temperatures in a stirred and unmixed media. These data
were used to determine the molecular, convective and effective diffusion
coefficients and to calculate the activation energies. The values of diffusion
coefficients were calculated by using Peleg and Mass transfer models, and
Arhenius rule was used for determination of activation energies. As a result of
the study, molecular, effective and convective diffusion coefficients were
determined for three different temperatures, and the activation energies of
molecular and convective diffusion were found as 54643.77 J/mole and 6326.12
J/mole, respectively.

Keywords

Polyphenols, Modelling, Diffusion, Gallic Acid, Cinnamonum zeylaniccum

References

• Profesör Doktor Ahmet TUTAR , [e-mail]
• Doktor Öğretim Üyesi Muhammed Cüneyt BAĞDATLI, [e-mail]