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University of Belgrade, Institute of Chemistry, Technology and Metallurgy – National Institute of the Republic of Serbia, Njegoševa 12 , Belgrade , Serbia
University of Belgrade, Institute of Chemistry, Technology and Metallurgy – National Institute of the Republic of Serbia, Njegoševa 12 , Belgrade , Serbia
Innovation Center, Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4 , Belgrade , Serbia
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University of Belgrade, Institute for Medicinal Plant Research “ Dr Josif Pancic”, Tadeuša Košćuška 1 , Belgrade , Serbia
University of Belgrade, Institute for Medicinal Plant Research “ Dr Josif Pancic”, Tadeuša Košćuška 1 , Belgrade , Serbia
The extraction of gallic acid from the pomegranate peel was carried out in a column with a diameter of 40 mm, in which pomegranate peel grains with a diameter of 2 mm were placed in a packed bed. The extraction fluid is recirculated through the system using a centrifugal pump. The fluids used in the extraction are: water, ethanol:water=50:50 and ethanol:water=96:4 (vol%). The experimental equipment has a temperature control system. The temperatures at which the experiment was carried out are: 35, 50 and 65OC. raction, as well as the models themselves. The models used in the analysis are: film theory, non-stationary diffusion. The equations used to describe the extraction are Peleg's equation and Ponomarjev's equation. The extraction parameters for gallic acid and the diffusion coefficient were determined. A model for the dependence of the mass transfer coefficient on temperature was established, as well as a criterion equation describing the extraction of gallic acid from the pomegranate peel. The yield of gallic acid in solution is good.
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