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Solid-Liquid Extraction Kinetics of Phenolic Compounds from Chinese Green Tea
Xi Jun * #
School of Chemical Engineering, Sichuan University, ChengDu 610065
*Correspondence author
#Submitted by
Subject:
Funding: The Specialized Research Fund for the Doctoral Program of Higher Education （No.No.20100181120076）
Opened online:22 November 2013
Accepted by: none
Citation: Xi Jun.Solid-Liquid Extraction Kinetics of Phenolic Compounds from Chinese Green Tea[OL]. [22 November 2013] http://en.paper.edu.cn/en_releasepaper/content/4570439
 
 
In this paper, the solid-liquid extraction kinetics of phenolic compounds from Chinese green tea using 50% ethanol at different extraction pressures was studied. The mechanism of extraction process was assumed to occur in two stages. The first step corresponds to a simple washing of the active ingredients from the particle surface. In the second step, the extraction is controlled by diffusion from within the solid particles to the solvent. The Kadi's model had been applied to estimate the ultrahigh pressure extraction kinetic. The kinetic coefficients of this mathematical model were calculated using the experimental results obtained from ultrahigh pressure extraction and conventional solvent extraction. The results showed a good prediction of Kadi's model for extraction kinetics in all experiments (R2≥0.996), which gave the possibility for estimation of the extraction rate and extent of ultrahigh pressure extraction.
Keywords:chemical separation process; solid-liquid extraction; kinetics; phenolic compounds; Chinese green tea
 
 
 

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