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Superheated water extraction of catechins from green tea leaves: Modeling and simulation

Goodarznia, I ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. Publisher: 2009
  3. Abstract:
  4. Catechins from fresh green tea leaves as potential sources of anticancer and antioxidant components were target materials in this work. Superheated water extraction, which is a kind of leaching operation, and solvent partition with chloroform and ethyl acetate were utilized to recover Catechins from tea leaves. Then, a mathematical model was developed to simulate the superheated water extraction of Catechins. The unsteady state mass balance of the solute in solid and superheated water phases led to two partial differential equations. The model was solved numerically using a linear equilibrium relationship. The model parameters were predicted applying existing experimental correlations. An intraparticle diffusion coefficient was used as the model tuning parameter. The model is able to show the influence of different process parameters, such as time of extraction, particle size and the ratio of water/leaves (v/w), on Catechin recovery. © Sharif University of Technology, December 2009
  5. Keywords:
  6. Catechins ; Mass transfer ; Modeling ; Superheated extraction ; Antioxidant components ; Different process ; Diffusion mass ; Ethyl acetates ; Experimental correlation ; Green tea ; Intra-particle diffusion ; Linear equilibrium ; Mass balance ; Model parameters ; Model tuning ; Modeling and simulation ; Potential sources ; Superheated water ; Superheated water extraction ; Target materials ; Tea leaves ; Unsteady state ; Computer simulation ; Differential equations ; Diffusion ; Equations of state ; Esters ; Leaching ; Mathematical models ; Organic solvents ; Phenols ; Vitamins ; Solvent extraction ; Antioxidant ; Disease control ; Extraction method ; Linear programing ; Metabolite ; Numerical model ; Parameterization ; Recovery method ; Solvent ; Tea
  7. Source: Scientia Iranica ; Volume 16, Issue 2 C , 2009 , Pages 99-107 ; 10263098 (ISSN)
  8. URL: http://scientiairanica.sharif.edu/article_3267.html